Having decided to rent a flat, we ____ contacting all the accommodation agencies in the city.

  A. set about                B. set down                C. set out            D. set up

 The only ____ of the plan is that it costs too much.

  A. drawback               B. mistakes                 C. fault               D. shortcoming

 ― Goods imported from abroad are ______ those made in China.

  ― Yes. Some of the goods made in our country are of high quality.

     A. always as good as          B. always no better than

     C. not so well as                D. not always better than

He was busy writing a story, only ______ once in a while to smoke a cigarette.

A. to stop              B. stopping            C. to have stopped  D. having stopped

No matter how frequently ______, the works of Shakespeare always attract large audiences.

      A. performed              B. performing

C. being performed      D. to be performed

I don’t remember how many years ago ______ people began to grow crops.

   A. it was when                                        B. it was that           

  C. was it when                                         D. was it that

 You have no idea how she finished the relay race with her foot   so much.

   A. to wound        B. wound       C. wounded        D. wounding

 -Where did you put the car keys?

--Oh, I _______ I put them on the chair because the phone rang as I _______in.

A. remembered; come            B. remembered; was coming

C. remember; come                D. remember; was coming

The river beyond our school has become clean again as new measures are ______ to prevent it ______ any further.

   A. taken; polluting                   B. taking; being polluted

   C. taken; being polluted            D. taking; to be polluted

----What’s happened to George?

----I don’t know. He ________.

  A. must have got lost                          B. may have got lost

  C. should have got lost                        D. can’t be lost