I really don’t know          I lost my purse.

     A. where it was that B. when was it that  C. it was where that D. that it was when

 ________ his arrival, he began to make preparations for the speech of the conference.

A. In                 B. With                    C. On                  D. By 

 —I’m sure Andrew will win the first prize in the final.

 —I think so. He ________ for it for months.

A. is preparing  B. was preparing  C. has been preparing  D. had been preparing

 The teacher stressed again that the students should not ________ any important details while retelling the story.

A. figure out             B. let out            C. leave out            D. pick out

 —The guard keeps         watch at the gate.

 —So he does. Only those         knows well could be let in.

A. close; who               B. tight; whom            C. tight; that               D. close; he

 He _______ have escaped, but he chose to stay and fight.

   A. must                 B. could                C. will                    D. need

 _______, according to the instructions, the medicine, I think, will work on your headache before long.

   A. Take               B. Being taking       C. Taken              D. Taking

 Only after spending several nights working on the math problem         to wonder whether the problem was wrongly set.

A. had he begun           B. he began                C. did he begin            D. began he

 I can’t persuade him out of playing computer games. He is          to them.

A. reminded                  B. accustomed           C. addicted                 D. stuck

 ______ by a greater demand of vegetables, farmers have built more green houses.

A. Driven             B. Being driven         C. To drive        D. Having driven