We should do ____ to stop sandstorms(沙尘暴)from happening again and again.
He usually gets up six o’clock Sundays.A. at; on B. on; at C. at; at
This is my friend,Jack Brown. His name is Brown.A. first B. middle C. family
---Mum, may I stop ________ a rest? I feel tired.A. having B. to have C. have
---Don’t you know Zhang Tao in my office? --- _______ He is my friend.A. Yes, I do. B. No, I don’t. C. Yes, I am
Computers first came into use ________.A. in 1950s B. on the 1950s C. in the 1950s