We were listening closely to the lecture yesterday evening when suddenly the light _______.
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A
had been gone out
B
was going out
C
was gone out
D
went out
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We were told to have our reading room_____ after school.
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A
clean
B
to clean
C
cleaning
D
cleaned
Would you please keep silent? The news that the milk contains a harmful chemical _________and I want to listen. 
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A
has been broadcast
B
is being broadcast
C
is broadcast
D
is broadcasting
I thought it __ very boring, but it wasn’t.
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A
is going to be
B
was going to be
C
used to being
D
can be