有几道选择题不明白，请教英语语法强则进，在线等，感激不尽，希望有详细的解答

__D____ nothing to talk about, the head said good-bye and went out of the room.
A. There was B. Being C. As there being D. There being
D，独立主格，因为一个句子只有一个谓语动词，这里的主谓为：the head said,
所以前半句用there being 独立主格节构，如果A 的话，一个句子就有两个主谓了，就错了。

I told the stranger how to get there but perhaps I __A__ him a map．
A. should have given B. had to give
C. ought to give D. must have given

A，应该给而没给，这句话的意思思，我为陌生人指路，事后，我想起来，我应该给他一张地图，（暗示事实上没有给他地图）。B，C，D 都表示我必须给他地图。但事实上，指路，并没有义务，强制性要给对方地图的。

____C__ , he never helps the poor.
A. As he is rich B. Even he is rich
C. Rich as he is D. Rich even though he is
C。富有如他，却从没帮过穷人。A。因为他富有，他从没帮过穷人，没有因果关系。B even 是副词，不是连词，语义上看着可能也对，但是副词不能连接两个句子，原就就有两个主谓，所以错了。D 一年就错了，没这么讲的

Not until the game had began __C___ at the sports ground.
A. should he have arrived B. had he arrived
C. did he arrive D. would he had arrived

C 直到游戏开始，他才到达体育场。 A。他本该到而没到，（不符）BD时态不对，翻过来就成了，直到。。开始，他已经到了。。。（失了这句话的本意）

__B___ quite recently, most mothers in Britain did not take paid work outside the home.
A. Before B. Until C. From D. Since
B，直到近些年，大多数英国妈妈才出门工作。 这里主要是强调 not,.. until的句式，你把其他选项放进去，就变成英国妈妈都不出门工做了。

So many directors __D___, the board meeting had to be put off.
A. were absent B. been absent C. had been absent D. being absent

D 这里也是独立主格，两个分句，中间没有联词，所以有一个主谓要变成独独立主格，这样就不会有违英语中，无论多长的句主，只有一个主句一个主谓。

I can’t find Mr. Fox in her office, she _A_____ for home.
A. might have started B. might start C. may be starting D. may start
A。可能已经出发回家了。

The wheel of the old wagon is nearly ___B___ that of a modern car.
A. twice size of B. twice the size of
C. twice as big D. as twice big as
B。是XX在两倍大小，twice the size of ...or .... double the size of ,,,固定表达方式。

The discussion ___C__ the question whether or not we should use our canned food ended in our favor.
A. of B. about C. over D. like
这题要看语感，有点绕。 主要是在 B C 两个答案上面，如果是B的话，我的讨论的问题是关于。。。。，如果是C的话，比B更进一步，我们彻底地讨论了该问题。所以说，我个人觉得不能说B错，只能说C更合适。

1. 这里前半句话是作伴随状语，所以不能独立成句，be动词就要换成being的形式，后半句才是主句。
2.这一句是虚拟语气，表示对过去情况的假设，所以要用should have done的句式。
3. 这里as是虽然的意思，意思是“虽然他很有钱，他也从来不帮助穷人”。 用as引导的时候句子要倒装。
4.这是固定句型。意思是“直到比赛开始他才赶到体育场。”否定词放在句首，句子要倒装。
5.这个也是not...until...的句型。
6.这和第一题是同一种情况，前半句做伴随状语，用分词代替动词。
7. 这是表示对过去情况的猜测。用情态动词加have done的结构。
8.这是英语中倍数结构的考查。①倍数+ the size（length，amount……）例如：The earth is forth-nine times the size of the moon. 地球是月亮的49倍大。
② 表示“……比……大几倍”，由“倍数+形容词（副词）比较级”结构组成。
例如：
This box is three times bigger than that one. 这个盒子比那个盒子大三倍。
The grain output is 8 percent higher this year than that of last year. 今年比去年粮食产量增加8%。
③ 表示“……是……倍”，由“倍数+ as +形容词+ as +”结构组成。
例如：
Our factory is twice as big as theirs. 我们的工厂是他们的三倍。
④还可以用by+倍数，表示增加多少倍。
The production of grain has been increased by four times this year. 今年粮食产量增加了4倍。
9.这里的over表示就...问题展开的讨论，介词的固定搭配。

1。这里there being做伴随状语。
2。should have done表示本该去做但实际上没有做。这里意思是我本应该给他一张地图（实际上没有）
3。rich as he is=even though he is rich
4。动作在had began之后发生，用一般过去式
5。这里是not ...until句型，还原成most mothers in Britain did not take paid work outside the home until quite recently 。
6。同第一题，做伴随状语。
7。她也许已经动身回家了，完成时
8。twice the size of ...的两倍
9。对某问题的讨论用over