________he was very tired, he still went on working hard.
A. For
B. Though
C. As
D. Since
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He ________to bed________he finished his homework last night.
A. don’t go; until
B. didn’t go; after
C. went; until
D. didn’t go; till
Tom had finished his work________his mother came back.
A. after
B. before
C. while
D. then
He told me________free, he would come to our party.
A. if was he
B. that if he was
C. whether he
D. that whether he was
It is five days________we came here.
A. when
B. before
C. as
D. since
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