9、--Have you worked out the problem, Sam?

--Not yet, but I       

A.didn't           B.a(chǎn)m going to            C.haven't                   D.can

9、B

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--Have you worked out the problem, Sam?

--Not yet, but I       

A.didn't           B.a(chǎn)m going to            C.haven't                   D.can

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