Computers ____ in offices and homes since 1970s.
#100256
A
have been used
B
had been used
C
was used
D
has been used
推荐题目
Don’t look down upon the ugly little worm. In a few weeks , it ________into a beautiful big butterfly.
#100645
A
transforms
B
would transform
C
have transformed
D
will transform.
I don’t think it is teachers who ________ for giving students too much pressure.
#103581
A
are to blame
B
are going to blame
C
are to be blamed
D
should blame
—What’s that terrible noise? —The neighbors ________ for a party.
#104750
A
have prepared
B
are preparing
C
prepare
D
will prepare
The library needs ________, but it’ll have to wait until Sunday.
#104295
A
cleaning
B
be cleaned
C
clean
D
being cleaned
He can________$ 3,000 a year by writing stories to support a family of three people.
#101097
A
spare
B
afford
C
earn
D
charge