How_________I help them to understand when they won’t listen to me?
A．canB．wouldC．mayD．must
A
本題考查情態(tài)動(dòng)詞。句中can表示“能夠”。句意：當(dāng)他們不會(huì)聽我的時(shí)候，我怎么能夠幫助他們理解呢？
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