Question:
Read the text and answer the questions.
My dad runs the Blue Street Zoo. Everyone calls him the Zoo King. That means Mom is the Zoo Queen. And that means that I'm the Zoo Prince! Being a prince is very special.

I spend every morning walking around to see the zoo. It's better than any animal book. I say hello to the lions. I say woof at all of the wolves. I make faces to the penguins. Once I even gave a morning kiss to a bear! My favorite animal is the piggy. I named him Samson. He likes to eat mustard, so I toss some mustard jars into his cage every morning. I don't know why that piggy likes mustard so much.

Sometimes I walk around with the Zoo King and Zoo Queen. Then we say hello to the animals together! I really like those days. Everybody who works at the Zoo says hello to us when we walk by. At lunchtime, we all go to the Zoo restaurant and eat pork chops. I hope Samson doesn't get mad about that!
1. Who runs the zoo?
2. And what is he called?
3. Who has been kissed?
4. Who gets woofed at?
5. Who is the favorite animal?
6. Is it male or female?
7. What is his name?
8. What does he like to eat?
9. Where did they eat lunch?
10. What did they eat?

Numbered answers:
1. Dad
2. The Zoo King.
3. a bear
4. the wolves.
5. the piggy.
6. Male
7. Samson.
8. mustard,
9. the Zoo restaurant
10. pork chops.

Question:
Read the text and answer the questions.
CHAPTER VIII

LAST DAYS ON THE FARM

"I believe you are right," said Tom, after he, too, had looked over some of the bits of paper strewn around. "Here is the word 'box' and here is the word 'Saturday.'"

"Yes, and here are the words, 'fast freight,'" added Sam. "This was nothing more than a letter box for the freight thieves."

"But why was it placed here?" questioned Dick. "It's a very out-of-the-way place and hard to get to."

"Maybe somebody had to come this way," answered Tom. "See, here is something of a trail."

"Yes, and here are those same big footprints!" exclaimed Sam. "For all we know they may lead to some house or hut on the mountainside."

Having picked up the majority of the bits of paper and put them in their pockets for future examination, the three Rover boys followed the path or trail they had discovered. It led along the mountainside to where there was a small clearing, backed up by a series of rocks from which a spring gushed forth, sparkling brightly in the sunshine.

"I'd like to get another drink," said Sam; "I am terribly thirsty to-day."

"Wait!" warned Dick, and caught his youngest brother by the arm.

"What's up, Dick?"

"I see a log cabin--over yonder, among the trees."

"Yes, and I see Dangler!" yelled Tom, suddenly. "There he goes, with a big bundle over his shoulder!" And he pointed to the rear of the log cabin. A man was just disappearing behind a fringe of brushwood. The bundle he carried appeared to be tied up in a horse blanket. He was running as hard as he could.
1. What did the boys find?
2. Were the letters intact?
3. How many words did Tom say he found?
4. What about Sam?
5. How many boys were there?
6. What did they find next?
7. What did Sam see on the ground?
8. Were they small?
9. Did they take the papers with them?
10. Where did they think they might end up?
11. Who wanted water?
12. From what?
13. What did Dick notice?
14. Who did they see?
15. Was he walking somewhere?
16. What was he carrying?
17. Was it a cloudy day?
18. Who was the youngest?
19. Were the letters found in a popular place?
20. Where was the spring located?

Numbered answers:
1. a letter box
2. no
3. Two
4. Two
5. Three
6. a trail.
7. footprints
8. no
9. The majority
10. some house or hut
11. Sam
12. a spring
13. a log cabin
14. Dangler
15. no
16. a big bundle
17. no
18. Unknown
19. No
20. a small clearing

Question:
Read the text and answer the questions.
The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second. It is named for Heinrich Rudolf Hertz, the first person to provide conclusive proof of the existence of electromagnetic waves. Hertz are commonly expressed in multiples: kilohertz (10 Hz, kHz), megahertz (10 Hz, MHz), gigahertz (10 Hz, GHz), and terahertz (10 Hz, THz).

Some of the unit's most common uses are in the description of sine waves and musical tones, particularly those used in radio- and audio-related applications. It is also used to describe the speeds at which computers and other electronics are driven.

The hertz is equivalent to cycles per second, i.e., "1/second" or formula_1. The International Committee for Weights and Measures defined the second as "the duration of 9192631770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom" and then adds the obvious conclusion: "It follows that the hyperfine splitting in the ground state of the caesium 133 atom is exactly 9192631770 hertz, (hfs Cs) = 9192631770 Hz."

In English, "hertz" is also used as the plural form. As an SI unit, Hz can be prefixed; commonly used multiples are kHz (kilohertz, 10Hz), MHz (megahertz, 10Hz), GHz (gigahertz, 10Hz) and THz (terahertz, 10Hz). One hertz simply means "one cycle per second" (typically that which is being counted is a complete cycle); 100Hz means "one hundred cycles per second", and so on. The unit may be applied to any periodic eventfor example, a clock might be said to tick at 1Hz, or a human heart might be said to beat at 1.2Hz. The occurrence rate of aperiodic or stochastic events is expressed in reciprocal second or inverse second (1/s or s) in general or, in the specific case of radioactive decay, in becquerels. Whereas 1Hz is 1 cycle per second, 1 Bq is 1 aperiodic radionuclide event per second.
1. What is a hertz?
2. What does it measure?
3. Anything else?
4. Like what?
5. How did it get its name?
6. Who is he?
7. Is it used only in English-speaking countries?
8. How do you know that?
9. What time span is used in defining the measurement?
10. How long is a second?
11. Who decided that?
Numbered answers:
1. the derived unit of frequency
2. sine waves
3. yes
4. also the speeds at which computers are driven.
5. It is named for Heinrich Rudolf Hertz
6. the first person to provide conclusive proof of the existence of electromagnetic waves
7. no
8. it is in the International System of Units (SI)
9. a second
10. "the duration of 9192631770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom"
11. The International Committee for Weights and Measures