(   ) 10. —How clean the bedroom is!

      -Yes. I am sure that someone        it.

   A. cleans   B. cleaned

   C. has cleaned   D. had cleaned

(   ) 9. He went to the park to        his key,but he didn't find it.

   A. find   B. look for

   C. find out   D. look after

(   ) 8. They had finished the work        last month.

   A. at the end of   B. in the end of

   C. by the end of   D. to the end of

(   ) 7. He        his pen at home yesterday. So he had to borrow one in class.

   A. had left   B. left

   C. forgot   D. had forgotten

(   ) 6. When we got to the meeting room,the report        already.

   A. begins   B. has begun

   C. has begun   D. had begun

(   ) 5. ―Have you ever overslept? -Yes,         .

   A. I do   B. I did

   C. I have   D. I haven't

(   ) 4. The left-behind kids (留守儿童) can't see their parents        their parents come back from work.

   A. but   B. till   C. and   D. if

(   ) 3. ―What happened        him?

―He was late for the meeting this morning.

   A. at   B. on   C. to   D. with

(   ) 2. Mr. Wang promised to come here today,but he hasn't        yet.

   A. shown up   B. woken up   C. come up   D. stayed up

(   ) 1.        the time I got up,my parents had already left.

   A. When   B. At   C. By   D. From