20.--Where do you think＿＿＿＿＿he＿＿＿＿the computer?

-- Sorry. I have no idea.

A.has ； bought　　　　 B.／ ； bought

C.did ； buy　　　　　　 D.had ； bought

19.I know Mr Brown； we ＿＿＿＿＿＿ to each other at an international conference.

A.are introduced　　　　 B.have been introduced

C.were introduced　　　 D.had been introduced

18.-- Where ＿＿＿＿＿?

-- I got stuck in the heavy traffic.I ＿＿＿＿＿ here earlier.

A.did you go； had arrived

B.have you been； would have been

C.were you； would come　　　　 D.are you； was

17.-- You haven’t said a word about my new coat, Brenda. Do you like it?

-- I’ m sorry I ＿＿＿＿＿＿ anything about it sooner.I certainly think it’ s pretty on you.

A.wasn’t saying　　　　 B.don’t say

C.won’t say　　　　　　 D.didn’t say

16.I’ve won a holiday for two to Florida.I ＿＿＿＿＿ my mum.

A.take　　　　　　　　　 B.am taking

C.have taken　　　　　　 D.will have taken

15.I ＿＿＿＿ ping-pong quite well, but I haven’t had time to play since the new year.

A.will play　　　　　　 B.have played

C.played　　　　　　　　 D.play

14.John and I＿＿＿friends for eight years.We first got to know each other at a Christmas party. But we＿＿＿＿＿ each other a couple of times before that.

A.had been； have met　　　　 B.have been； have met

C.had been； had met　　　　　 D.have been； had met

13.-- Alice came back home the day before yesterday.

-- Really ? Where ＿＿＿＿＿ ?

A.has she been　　　　　 B.had she been

C.has she gone　　　　　 D.had she gone

12.-- I will come to attend your lecture at 10：00 tomorrow.

-- I’m sorry, by then my lecture will have ended and I＿＿＿my

guests in my office.

A.is being met　　　　　 B.will meet

C.will be meeting　　　 D.will have met

11.-- Has Jack finished his homework yet?

-- I have no idea；he ＿＿＿it this morning.

A.was doing　　　　 B.had been doing

C.has done　　　　　 D.did