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I’m afraid I’m not _____ to help with the show next week.
A.availableB.dependableC.valuableD.convenient
A
词义辨析。   A. 有效地   B. 可靠地  C.有价值的   D.方便的。句意:恐怕我不能有效帮助下周的展出。故选A。
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