By the time the firemen arrived, the whole building ________.
A. has burned down
B. had burned down
C. will have burned down
D. burned down
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_______Charles started a job, he did it_______it was finished.
A. Since, where
B. Once, until
C. Each time, once
D. The moment, as
________the cold weather, we decided not to go out.
A. Because
B. Due
C. Owing to
D. Since
________ he will not accept the offer, I have to find someone else.
A. Until
B. Though
C. As soon as
D. Seeing that
Let's take the front seats ______we may have a better view.
A. so as to
B. in order to
C. in order
D. that