I usually exercise ten _______ eleven times a week. [ ]A. at B. or

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I usually exercise ten _______  eleven times a week.   [     ]
A. at
B. or
C. for
D. in

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举一反三

The students were singing an English song _____ Mr. Xiang came in the classroom. [ ]
A. after
B. when
C. before
D. as

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He has no brothers _____ sisters.[     ]
A. but
B. and
C. or
D. /

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English is interesting, ______ I didn’t like it at first.[     ]
A. and
B. so
C. but
D. or

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My father was working at the desk        I went in. [     ]
A. when
B. while
C. if
D . since

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—Can you come to my birthday party?
—Yes, I"d love to, _____ I have to look after my mother in hospital.       [     ]
A. but
B. and
C. so
D. or

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