TASK DEFINITION: Given a sentence with a missing word, pick the answer option that best fills out the missing word in the sentence. Indicate each answer with its index ('a', 'b', 'c', 'd').
PROBLEM: All spider mites have ____ legs and a lack of a separate head.\Question: Choose the right answer from options given a) eight b) four c) ten d) one

SOLUTION: a

PROBLEM: Sea stars have ____ arms, or rays, connected to a small round body.\Question: Choose the right answer from options given a) five b) six c) seven d) no

SOLUTION: a

PROBLEM: Sows can have up to ____ litters per year.\Question: Choose the right answer from options given a) two b) no c) ten d) nine

SOLUTION:
a