when and where to go for the on-slary holiday___yet

when and where to go for the on-slary holiday___yet
a:are not decided b:have not been decided c:is not being decided d:has not been decided
英语人气:580 ℃时间:2019-11-10 11:17:07
优质解答
D.
两个疑问词作主语时,谓语动词用单数,而且是现在完成时.
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