8、Peter is busy _________ at school,but he never forgets _________ exercise every day.

A.working;doing           B.working;to do           C.a(chǎn)t work;doing

8、B

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Peter is busy _________ at school,but he never forgets _________ exercise every day.

A.working;doing           B.working;to do           C.a(chǎn)t work;doing

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