With the development of modern society, E-mail as well as telephones     an important part in daily communication.
#100960
A
have played
B
is playing
C
are playing
D
had played
推荐题目
I would have come sooner but I ________ that they were waiting. 
#104791
A
haven’t known
B
hadn’t known
C
don’t know
D
didn’t know
— I’m sorry, I thought the remark would amuse you.— It _____.
#104978
A
wouldn’t
B
won’t
C
doesn’t
D
hadn’t
Although she is pretending hard to be young, grey hair and the lines on her face _______.
#100643
A
give her away
B
pick her up
C
take her away
D
hold her up