While watching television, __________.
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A
the doorbell rang
B
the doorbell rings
C
we heard the doorbell ring
D
we heard the doorbell rings
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It is recommended by the representatives that traditional cultures _____
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A
should preserve
B
have been preserved
C
be preserved
D
must be preserved
But for their help, we ______ the program in time.
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A
can not finish
B
will not finish
C
had not finished
D
could not have finished
----Marx looks nervous.----So __________ you if you had so fierce a competition.
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A
do
B
did
C
will
D
would
-----I thought I ______something burning . -----Really?
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A
smelled
B
was smelling
C
could smell
D
might smell