______,the boy couldn’t enter his house.

A.Since the key had lost　　　　                      B.The key being lost

C.Lost the key　　　　                                    D.Having lost the key

I had a lot of trouble______the book you wanted.

A.on finding                 B.in finding                  C.to find                      D.at finding

— What did he _______ when he went out?

    — An umbrella.

A. take along              B. take down              C. take on                  D. take out

I want to buy a pair of new trousers to ___ my sweater.

A. go with   B. go off   C. go on with   D. go in for

If I ___ free tonight, I'll go to the cinema with you.

A. am   B. was   C. will be    D. be

How this kind of plant can be ____ in a special way is still unknown to us.

A. kept away   B. kept out    C. kept alive    D. kept off

There ___ two football matches on TV tonight.

A. are going to have   B. are going to be  C. is going to be   D. are going to has

---Please remember me ___ your family. ----I certainly will

A. with    B. for    C. about    D. to