The monkeys are running and jumping ______. [ ]

Do you love reading Guo Jingming’s novels? —Of course I do，but Ithem for a long time because I’m always busy．

I’ve become good friends with several of the students in my school _______ I met in the English speech competition last year.

Do you know the girl?—Yes, ______ name is Linda.

The accident happened _______ a cold winter morning. [ ]