(2018唐山市路北区一模)My parents usually take a walk________ dinner to keep healthy.

A.in B.until C.before D.after

Michael Jordan is a great American basketball player. He was born _________ 1963.

A. on    B. at    C. in    D. by

(2018永州改编)Stephen Hawking, a great scientist, died ________the morning of March 14, 2018.

A.on B.in C.at D.to

(2018重庆B卷)—Excuse me, is there a computer room in your school?

—Yes. It's________ the fifth floor.

A.on B.in C.at D.to

Mum won’ t let Simon go out unless he promises to be back ______10 o’ clock tonight.

A. till    B. before    C. as    D. since

(2019原创)The best way of solving the problem is to keep ________ trying.

(2019原创)It's very kind________ you to help me with my lessons, because it's hard for me to learn them well.

(2019原创)We can listen ________ some soft music to make us feel relaxed.

(2019原创)Sarah  is very good________ dancing and singing. She wants to be an actor in the future.

(2018唐山开平区二模)After hearing f________ her sister, she read the letter and wrote back in no time.