E-mail, as well as telephones, ____________ an important part in daily communication.
#85743
A
are playing
B
have played
C
is playing
D
play
推荐题目
The Smiths ______ their breakfast when the doorbell rang.
#86177
A
had
B
has been having
C
are having
D
were having
---The population of Henan ___________ very fast.---I agree. The population problem may be one of the most serious ones today.
#44244
A
are growing
B
grew
C
is growing
D
is grown
Collecting stamps as a hobby___________ increasingly popular during the past fifty years.
#86319
A
becomes
B
became
C
has become
D
had become