【題目】We've been told the good news, but when and where to go for the exciting paid vacation __________ yet.

A. are not discussed B. have not been discussed

C. is not being discussed D. has not been discussed

【答案】D

【解析】后一分句的主語為 when and where to go for the exciting paid vacation, 表示的是一件具體的事,謂語動詞用單數(shù)形式,由此排除A、B兩項。根據(jù)句末的yet可知應該用完成時,即這件事還沒有被討論。因此D項正確。

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