The number of foreign students attending Chinese universities _____ rising steadily since 1997.
#102050
A
is
B
are
C
has been
D
have been
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Would you please keep silent? The weather report ____ and I want to listen.
#100721
A
is broadcast
B
is being broadcast
C
has been broadcast
D
had been broadcast
When I called you this morning, nobody answered the phone. Where ________? 
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A
did you go
B
have you gone
C
were you
D
had you been
The manager was concerned to hear that two of his trusted workers ______. 
#102158
A
will leave
B
are leaving
C
have left
D
were leaving