【題目】—We are all looking forward to Dr. Green’s talk.

—Dr. Green is busy these days. I’m not sure _______ he will be able to come here.

A.whetherB.thatC.when

【答案】A

【解析】

句意:——我們都很期待格林博士的演講!窳肿罱苊。我不確定他是否能來這里。

考查賓語從句引導詞。whether是否;that(無意義);when什么時候;根據(jù)“I’m not sure _______ he will be able to come here.”我不確定他 能來這里,所以此處缺是否,故選A。

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