Bears often hide themselves in places __________ can’t be found by hunters.

   A. in which               B. where            C. that               D. 不填

 There were dirty marks on her trousers _______ she had wiped her hands.

    A. when                B. which             C. where             D. that

 After a lot of questioning, Jack ______ admitted he had taken the car.

   A. frequently             B. eventually         C. absolutely          D. generously

 My sister met him at the Grand Theater yesterday afternoon, so he ________ your lecture.

   A. couldn’t have attended                B. needn’t have attended

   C. mustn’t have attended                 D. shouldn’t have attended

 Though ________ in a big city, Bill always prefers to sing the songs of country life.

    A. bringing up          B. grown              C. raised             D. keeping

 ________ is known to us a11 is that the Diaoyu islands have been part of our Chinese territory since ancient times.

   A. As                  B. Which              C. It                 D. What

Why hasn’t he come?________ on time, we would have to put off the trip.

A. If he doesn’t come B. If he will not come　　

C. If he didn’t come　 D. If he wouldn’t come

 Kate _________ in America for many years, but she’d never regretted her decision to return to her motherland.

    A. worked              B. was working           C. has worked         D. had worked

 The old man, ________ abroad for twenty years, is on the way back to his motherland.

A. to work                B. working            C. to have worked       D. having worked

 If anybody calls, tell them I’m out, and ask them to _______ their name and address.

A. pass               B. write                  C. take                 D. leave