The old couple has been married for 40 years and never once ____ with each other.
A. they have quarreled
B. they had quarreled
C. have they quarreled
D. had they quarreled
It was ____ he said ____ annoyed me.
A. that; what
B. what; that
C. what; what
D. that; that
so fast ____ that it is difficult for us to imagine its speed
A. light travels
B. travels light
C. does light travels
D. does light travel
____ for the free tickets, I would not have gone to the films so often.
A. If it is not
B. Had it not been
C. Were it not
D. If they were not
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