E-mail , as well as cellphones, _____an important part in daily communication.
#102596
A
have played
B
play
C
are playing
D
is playing
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He _________ English for eight years by the time he graduates from the university next year.
#100205
A
will learn
B
will have learned
C
will be learning
D
has graduated
My mind wasn't on what he was saying so I'm afraid I ______ half of it. 
#101245
A
was missing
B
had missed
C
will miss
D
missed
—When did you come back? —Half an hour ago. You ____ to music.
#100901
A
have been listening
B
were listening
C
had listened
D
listened
-Why does the river smell terrible?-Because large quantities of water______.
#100039
A
have been polluted
B
is being polluted
C
has been polluted
D
have polluted
It was difficult to get a word in. Everyone___so excitedly about the play.
#100943
A
talked 
B
was talking 
C
would talk  
D
had talked