you must keep your jacket ()A.clean B.cleans C.to clean D.cleaningplease () look outside .look at the blackboard.A .not B.aren't C.don't D. can't

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you must keep your jacket ()A.clean B.cleans C.to clean D.cleaningplease () look outside .look at the blackboard.A .not B.aren't C.don't D. can't
you must keep your jacket ()A.clean B.cleans C.to clean D.cleaning
please () look outside .look at the blackboard.A .not B.aren't C.don't D. can't

you must keep your jacket ()A.clean B.cleans C.to clean D.cleaningplease () look outside .look at the blackboard.A .not B.aren't C.don't D. can't
1 A
固定用法:keep +宾语+形容词
2 C 祈使句的否定句是:don't开头

A、clean
C、don't