Today,too many trees are still _____ in the world.
A. cuttingdown
B. cutdown
C. beingcutdown
D. cutteddown
Who was the book___?
A.write
B.wrote
C.written
D.writtenby
The People's Republic of China ___ on October 1, 1949.
A.found
B.wasfounded
C.isfounded
D.wasfound
New computers ___ all over the world.
A.isused
B.areusing
C.areused
D.haveused
Our room must ___ clean.
A.keep
B.bekept
C.tobekept
D.tokeep
The old bridge in my hometown___ next month.
A.isgoingtoberebuilt
B.willrebuilt
C.aregoingtoberebuilt
D.aregoingtorebuilt
Look! A new house ___ at the corner of the road.
A.isbuilding
B.isbeingbuilt
C.beenbuilt
D.bebuilding
The books may___ for two weeks.
A.bekept
B.beborrowed
C.keep
D.borrow
The important meeting ___ on a cold morning last year.
A.washad
B.washeld
C.held
D.had
So far, the moon ____ by man already.
A.isvisited
B.willbevisited
C.hasbeenvisited
D.wasvisited
The students _____ often _____(tell) to take care of their desks and chairs.
That play ________(put) on again sometime next month.
The old man is ill. He ______ (must send) to the hospital.
Vegetables, eggs and fruits_________ (sell) in this shop.
A Piano concert _____________(give) here last Friday.