单项选择题

Mr Green went home () Christmas, the children had a good time () Christmas Eve.

A. on, on
B. at, on
C. in, in
D. at, at

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单项选择题

He always did well at school () having to do part-time jobs every now and then.

A. in spite of
B. instead of
C. in case of
D. in favor of

单项选择题

Once lost().

A. it is hard to get such a chance again
B. to get such a chance will be difficult
C. one can never get such a chance again
D. such a chance might never come again