Question

When and where to go for the on-salary holiday ______ yet.

When and where to go for the on-salary holiday ______ yet.
A.are not decided B.have not been decided
C.is not being decided D.has not been decided 本题考查主谓一致和时态。因主语为一个动词不定式短语，所以应为单数，再根据时间状语yet分析，此处使用现在完成时态。
答案：D 因主语为一个动词不定式短语，所以应为单数，那如果改成When to go and where to go 呢？

Answer 1

由and/both...and连接的并列主语的主谓一致问题

由and/both...and连接的并列结构作主语，可根据主语的意义决定谓语动词的单、复数形式。

例如：

Pancakes and syrup is a tasty breakfast.

The number and diversity of British newspaper is considerable.

Good and bad taste are inculcated by example.

Fish and chips are getting very expensive.

A truck and a car were in the ditch.

Both Cathy and her daughter Lida have gone fishing in Canada.

当and连接的并列名词词组带有each，every,或者many a 等限定词时，谓语动词通常用单数。

例如：

Each man and each woman there is asked to help.

Every flower and every bush is to be cut down.

Every change of season, every change of weather, indeed every hour of the day, produces some change in the magical hues and shapes of these mountains.

Many a boy was disappointed after seeing the film. 你自己好好看看吧。

Answer 2

还是选D，当指的是两件不同的事时采用复数形式。比如是what caused the accident and who was responsible for it are not yet clear.应该理解为两件事吧。所以应该是B，就是你那种形式不是很常见。出现了还是用复数形式吧！

Answer 3

不可能那样表达的，重复罗嗦当然如果真的有这种AND并列连接两个，用复数，没问题