21.In such dry weather, the flowers will have to be watered if they _______.
A.have survived B.are to survive
C.would survive D.will survive
22._______ at the door before entering, please.
A.Knocked B.To knock
C.Knocking D.Knock
23. Hundreds of jobs _______ if the factory closes.
A.lose B.will be lost C.are lost D.will lose
24. I've won a holiday for two weeks to Florida.I _______ my mum.
A.am taking B.have taken
C.take D.will have taken
25. A new cinema _______ here.They hope to finish it next month.
A.will be built B.is built
C.has been built D.is being built
26.The new suspension bridge _______ by the end of last month.
A.has been designed B.had been designed
C.was designed D.would be designed
27. _______ blood if you can and many lives will be saved.
A.Giving B.Give
C.Given D.To give
28.-You've left the light on.
-Oh, so I have._______ and turn it off.
A.I'll go B.I've gone
C.I go D.I'm going
29. -How are you today
-Oh, I _______ as ill as I do now for a very long time.
A.didn't feel B.wasn't feeling
C.don't feel D.haven't felt
30. The reporter said that the UFO _______ east to west when he saw it.
A.was traveling B.travelled
C.had been traveling D.was to travel
31. My uncle _______ until he was forty-five.
A.married B.didn't marry
C.was not marrying D.would marry
32.An awful accident _______, however, occur the other day.
A.does B.did
C.has to D.had to
33. Old McDonald gave up smoking for a while, but soon _______ to his old ways.
A.returned B.returns
C.was returning D.had returned
34. —You're drinking too much.
—Only at home.No one _______ me but you.
A.is seeing B.had seen
C.sees D.saw
35. All the preparations for the task _______, and we're ready to start.
A.completed B.complete
C.had been completed D.have been completed
36. _______ some of this juice—perhaps you'll like it.
A.Trying B.Try C.To try D.Have tried
37. The price _______, but I doubt whether it will remain so.
A.went down B.will go down
C.has gone down D.was going down
38. —Hey, look where you are going!
—Oh, I'm terribly sorry._______.
A.I'm not noticing B.I wasn't noticing
C.I haven't noticed D.I don't notice
39.E-mail, as well as telephones, _______ an important part in daily communication.
A.is playing B.have played
C.are playing D.play
40.He _______ to the lab than he set out to do the experiment.
A.has no sooner got B.no sooner got
C.will no sooner get D.had no sooner got
