B．has been approved C．is to approve

　　D．will be approved 解析：选B。考查时态和语态。根据by the authorities的提示可知，应用被动语态，可排除A、C项；同时根据语意“直到我们的计划被官方批准”可知，应用现在完成时。 2．(2016·山东临沂质检)The vegetable looking fresh in his field ________ well.It’s often sold out the minute it appears in the market. A．has sold

　　B．has been sold C．is sold

　　D．sells 解析：选D。考查时态语态。sell well意为“销路好”。表示通常情况，应用一般现在时。 3．(2016·唐山市调研)—Flight 302 to Paris________until 7∶30 tomorrow morning. —No wonder I hear so many complaints from the passengers. A．put off

　　B．has been put off C．will put off

　　D．had been put off

　　解析：选B。考查时态和语态。据下文可知航班推迟这事已经发生，而且是针对现在而言的，因此用现在完成时；同时flight与put off之间构成了被动关系，故答案为B。 4．(2016·皖南八校联考)We’ve been told the good news，but when and where to go for the exciting vacation ______ yet. A．are not discussed B．have not been discussed C．is not being discussed D．has not been discussed 解析：选D。后一分句的主语为when and where to go for the exciting vacation，表示的是一件事，谓语动词用单数形式，由此排除A、B两项。根据句末的yet可知应该用完成时，即这件事还没有被讨论。因此D项正确。 5．(2016·北京崇文练习)It________that the road will be closed tomorrow for repairs. A．was announced

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