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【单选题】

How many days a week does John work?

A.
five
B.
six
C.
seven
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参考解析:
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举一反三

【单选题】When you start exercising, you should walk___.

A.
twenty to thirty minutes a day
B.
five miles a day
C.
a few minutes a day

【单选题】Some people don't know how to start exercising, so they___.

A.
never exercise
B.
exercise only sometimes
C.
hardly ever exercise

【单选题】Isabel plays tennis ___.

A.
three times a week
B.
five times a week
C.
four times a week

【单选题】Bob goes swimming ____.

A.
one hour a week
B.
three times a week
C.
one hour a day, four times a week