―Was the doctor there when you arrived?

   ―Yes, but he ______ out a moment later.

A. had gone                                                  B. has gone

C. went                                                      D. is going

 ―Why? Where is the key to the sound lab?

   ―Dear me! You _______ it in the taxi！

A. have never left                                       B. never left

C. haven’t left                                          D. didn’t leave

―________ for Beijing?

　 ―Yes. And I’ll come back in three months.

　 A. Have you left　　　　　 　　　　　　　　　 B. Are you leaving

C. Do you leave　　　　　　 　　　　　　　　　　　　D. Did you leave

 ―What were you doing when I called you yesterday afternoon?

   ―I ________ my homework and I was starting to take a bath.

A. had just finished                              B. was finished

C. have already finished                          D. was going to finish

My money_____, I must go to the bank to draw some of the savings out before I have none in hand.

　 A. has run out　　　　　　　　　　　 　　　　　　　　B. has been run out

C. is running out　　　　　 　　　　　　　　　　　　 D. is being run out

 ―Twenty dollars, please!

   ― How terrible!―I ________ to bring my wallet with me.

   A. was forgetting                               B. forgot 

C. had forgotten                                D. am forgetting

 ―What’s the matter? You look worried and restless.

   ―Oh, nothing really serious. As a matter of fact, I ______ of my graduation thesis. I have to hand it in soon.

A. am just thinking                              B. just thought

C. have just thought                             D. was just thinking

 ―What about 10 o’clock tomorrow morning?

   ―I’m afraid I can’t make it. I _________ then.

A. am going to take an exam                       B. am taking an exam

C. will be taking an exam                          D. an to take an exam

 ―Do you have anything to do this afternoon?

―What’s up?

―Let’s go shopping. It’s said that Jinying Shop _____, and all the sweaters are sold at half price.

―Why not?

A. has closed down                                   B. was closing down

C. closes down                                      D. is closing down

 One of them told me, “This is the first time I ________ to the capital to attend the flag-raising ceremony.”

A. came                                           B. come

C. have come                                      D. had come