E-mail, as well as the telephone, _____an important part in daily communication. 
#85607
A
is playing
B
have played
C
are playing
D
play
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Not only Jack but also his parents ________ the home accident.
#85933
A
is to blame on
B
are to blame for
C
is blamed for
D
are to be blamed for
John is one of the staff members who ___to be sent abroad for further study.
#86346
A
is going
B
are going
C
have been going
D
has been going.