My Old Classmate also mentioned some important events that _______ from 1993 to 2013.

A. had happened B. was happened

C. happened D. has happened

—Why are you packing so many books?

—I’ll _______ to the kids in West China.

A. give them up B. give them away

C. give them off D. give them in

Robert is away. He _______ America since last week.

A. has been to B. has joined a club in

C. has studied in D. has become a manager in

Stephen Hawking thinks _______ important to have hope in bad situation.

A. it B. that C. this D. its

—This is _______ fascinating museum I have ever visited.

—Yes. I’ve never seen a _______ one.

A. the worst, bigger B. the most, better

C. the better, the best D. the worst, good

—_______ are you leaving for Shanghai?

—In a couple of months.

A. How long B. How often

C. How soon D. How fast

—What will the weather be like tomorrow?
—It _______ be rainy, cloudy or sunny. Who knows?
A. must B. might

C. shall D. should

You’d better_______ your cigarette when you are in the wood.

A. put on            B. put up   

C. put out D. put off

—Will you give me a hand? I have some trouble_______ the scientific problem.

—Don't worry. I'll try my best to help you _______.

A. solving; in five minutes

B. to solve; in five-minute

C. to solve; after five minutes

D. solving; after five-minutes

—It’s dangerous to swim here. Look at the sign!

—Oh, I _______ it.

A. didn’t notice B. don’t notice

C. hadn’t notice D. haven’t notice