【題目】According to Professor Johnson, we don’t have to read the book if we don’t want to, as it is ______.

A.worthwhileB.necessaryC.optionalD.serious

【答案】C

【解析】


考查形容詞詞義辨析。句意:根據(jù)約翰遜教授的說法,如果我們不想讀這本書,就不必讀,因為它是可選擇的。A. worthwhile值得的;B. necessary必要的;C. optional 可選擇的,選修的;D. serious嚴肅的,認真的。根據(jù)“we don’t have to read the book if we don’t want to”可知,這本書讀不讀都可以,由此可知,它是可選擇的。故選C。

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