The probability of receiving a 911 call on a university campus is the same every day. The probability of having received a 911 call on a single day does not change the probability of receiving a 911 call on any other day. Which of the following distributions would you use to determine the probability that a 911 call will be received next day?

Can you lend me the book ______the other day？

I would like to introduce to you the gentleman whom I ________ the other day.

--The day before yesterday I saw John at a party. A: Oh, are you free now? B: Yesterday was a fine day. C: Oh, I haven't seen him for a long time. D: We had a good time yesterday.

【单选题】愚人节你们也会相互恶作剧吗? A. Do you also make tricks on each other on April Fool’s Day? B. Do you also play tricks on each other on April Fool’s Day? C. Do you also play with each other on April Fool’s Day?