TASK DEFINITION: In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D". 
PROBLEM: [header] How to treat your customer while serving them [title] When the customer approaches your till point, greet them nicely. [step] This means you should acknowledge the customer with eye contact. Say " hello " and smile. <sep> (A) [title] Apologise for any wait, no matter how short. [step] The customer might not understand why they have had to wait. (B) [substeps] Also greet them in a professional manner. Always state your name, address, and similar things. (C) Offer him or her a fresh drink once in awhile. [substeps] Remember to shake each customer's hand. (D) If you don't meet their smile they'll get bored and start saying no. To greet the customer again, do a brief " hi " and introduce them to your horde.

SOLUTION: A

PROBLEM: A marching band is in the midle o street. behind the marching band <sep> (A) people are in s street playing. (B) the drummers are covering the ground. (C) , a tire is taken off and replaced with a new tire. (D) a fire truck is in the parade.

SOLUTION: D

PROBLEM: [header] How to hire a private investigator [title] Decide what you want the pi to do. [step] Private investigators can track down all kinds of people and information, but their skills will vary. Some are good at following people or digging up information, while others can track down someone or something. <sep> (A) Before you start looking, you need to be clear about what kind of work you want the pi to do so you can find someone with the right skills and equipment. [substeps] Pis can provide a variety of services, including background checks, tracking down child support or custody, providing electronic and video surveillance, or tracking down individuals. (B) Decide what you want the pi to do and leave the decision to the investigator. [title] Conduct an internet search for " private investigators. (C) Some investigators investigate just for the perks of checking up on suspects, while others are able to find even criminal charges. [substeps] There are online pi groups that offer specialized investigator courses that can help you hone the skills needed to work in the field. (D) Decide who you want the pi to hunt down. [substeps] Don't hire a pi to find people yourself.

SOLUTION:
A