---How long has the factory _______?

---Since three years ago.

A. open       B. be open

C. been open  D. been opened

It’s a secret. You _____ tell anyone about it.

A. mustn’t  B. must  C. can  D. needn’t

I didn’t hear you because I ____ a shower at that moment.

A. have taken    B. will take

B. C. was taking  D. am talking

It _____five months since I came to America.

A. was   B. is   C. will be    D. had been

That piece of music created by the new singer sounds     . We all like it.

A. terrible    B. terribly   C. wonderfully     D. wonderful

They all looked _____ me _____ surprise, but I didn’t know why?

A. for, to    B. by, for   C. up, over    D. at, in

The story is hard to understand, _____ there are no new words in it.

A. so   B. but   C. though   D. until

It’s such difficult work, but _____ of them four felt frustrated.

A. neither   B. both    C. none   D. All

Don’t worry. My brother has got many vegetables. You can have some of______.

A. mine   B. yours   C. his   D. Hers

Eight _____ pounds per month? That’s not much.

A. hundred of    B. hundreds of

C. hundreds      D. Hundred