Another driver had just driven into the back of Jack’s car ________ he was waiting at some traffic lights.
A. since
B. once
C. while
D. as
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You’re going to England next year. You must practise ________ English as much as possible.
A. speaking
B. to speak
C. having spoken
D. being spoken
________ what was going to happen, I would never have left her alone.
A. If I knew
B. Had I known
C. Were I knew
D. I had known
I prefer to spend the weekend at home ________ go to the movies.
A. rather
B. rather than
C. better than
D. to
When you talk, you have to at least make yourself ________.
A. understand
B. to understand
C. understood
D. understanding