I’m afraid I’m not _____ to help with the show next week.
A．a(chǎn)vailableB．dependableC．valuableD．convenient
A
詞義辨析。   A. 有效地   B. 可靠地  C.有價(jià)值的   D.方便的。句意：恐怕我不能有效幫助下周的展出。故選A。
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