---Which one do you mean? ____ black one with a long tail?

　　A. an, The B. an, An C. the, The D. the, An

　　42. ---What happened to Tom?

　　---He was crossing the street ____ a motorbike hit him from behind.

　　A. while　 B. when C. until D. because

　　43. ---Dad, what’s the sea like?

　　---Well, it’s large and full of water. It covers about _____ of the earth.

　　A. one third B. three quarter C. three-fourth　 D. three quarters

　　44. ---Go and ask the waiter how much_____.

　　---Don’t worry. It has been _____.

　　A. does the meal cost, paid for　　 B. the meal costs, paid

　　C. the meal spends, paid　　　　　　　 D. the meal costs, paid for

　　45. ---Does the child need any help?

　　---No. He is old enough to _____ himself.

　　A. put on B. wear C. dress D. take care

　　46. ---There can be no life on the earth without water.

　　---That’s right. Water _____ everywhere.

　　A. needs B. is needing C. is needed D. needed

　　47. ---Were you late ____the meeting?

　　---No, I arrived there ten minutes______ the meeting started.

　　A. for, before B. at, before C. for, till D. at, after

　　48. ---Excuse me, but I don’t think you can take photos here.

　　---Sorry I ____ this is no-photo zone.

　　A. don’t know B. didn’t know C. have no idea D. haven’t known

　　49. ---How many English words had you learned _____ the end of last term?

　　---Around 2000, but I’ve forgotten most of them.

　　A. by　 B. at　　　C. to 　 D. on

　　50. ---Are you learning art now during your spare time?

　　---No. I’ve stopped _____ Chinese medicine instead.

　　A. to learn B. learning C. learn D. studying