Part 1. Definition
In this task, you are given a question containing a blank (_) and two options. You should pick the best option to answer the question. Please answer with "A" or "B".
Part 2. Example
Katrina gave Christine a stuffed animal for their birthday, but _ already had this one. (A) Katrina (B) Christine
Answer: B
Explanation: Since the blank is someone who received the gift and already had a stuffed animal, the answer must be "Christine".
Part 3. Exercise
Christine always followed Lindsey when they went mountain climbing because _ was teaching what to do. (A) Christine (B) Lindsey
Answer:
B