He criticized the students ________they did anything wrong.
A. However
B. whenever
C. whatever
D. whichever
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No sooner had we arrived at the cinema _______the film began.
A. before
B. than
C. as soon as
D. when
Hardly had we reached home _______it began to rain.
A. than
B. before
C. when
D. as soon as
You can not watch TV ______you’ve finished your homework.
A. since
B. until
C. as
D. after
We had scarcely left our school _______the rain began.
A. before
B. than
C. while
D. when