E-mail, as well as telephones, ____ an important part in daily communication.
#85683
A
is playing
B
have played
C
are playing
D
play
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Professor Smith，along with his assistants， on the project day and night to meet the deadline.
#86243
A
work
B
working
C
is working
D
are working
The day before yesterday the police including one officer ____ searching for the murder in that mountain.
#85886
A
is
B
were
C
are
D
was
Robert with his two kids ________ to the beach for vacation every year.
#44177
A
go
B
went
C
are going
D
goes