Mr. Grey has two sons, ______ are famous dancers.
A. both they
B．both of them
C. they both
D．both of whom
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What is the man going to do this summer
A. Work to earn extra money.
B. Work for the coming exams.
C. He won’t earn a little money.
What is the woman waiting for How often should the bus come to their stop
A. Every twenty minutes.
B. Every half an hour.
C. Once a day.
What does the woman advise the man to do
A. Solve it as soon as possible.
B. Count the time it needs.
C. Be patient with the problem.
—______ may I ______ the book —For three weeks.
A. How often; borrow
B. How often; keep
C. How long; borrow
D．How long; keep
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