The students    how to do the experiment in class yesterday.
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A
were taught
B
better
C
was taught
D
teach
推荐题目
Everyone of us _____ it’s important _____a seat belt in the car.
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A
knows, wears
B
know, to wear
C
knows, to wear
D
know, wearing
 It’s important for us_____ in good health.  
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A
keep
B
keeping
C
to keep
D
kept
Don’t discuss the problems with your partner unless you ___ to do so.
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A
ask
B
are asked
C
will ask
D
will be asked