Question

帮忙解释几道英语题~~谢啦

1.It was not until December 31 __________ we heard from him.
A. which B. when C. that D. then
2.At one time we had about eighty people here who did nothing but __________into various family history.
A. researched B. research C. researching D. to research
3.— How __________ will you be able to come back from you travel?
— In a couple of weeks, perhaps.
A. fast B. long C. often
4.Your hair needs __________. You’d better have it done tomorrow.
A. cut B. cutting C. to cut D. being cut
D. soon
5.When __________ to dinner at the White Rose Restaurant, he seemed very happy and accepted the invitation.
A. invited B. inviting C. to be invited D. having invited

Answer 1

1强调句。 it was that
2nothing but do sth
3根据下面的回答可以知道对方是问去多久毁握昌，所以要用How long ，How often是问多经纤扒常。一般回答是皮旅每隔多久才去一次How fast是问速度的
4 cut 可表被动态，need to be done /need doing 表被动你的头发需要把被怎样~~故选B便可
5还原句子是When he having invited to dinner at the White Rose Restaurant, he seemed very happy and accepted the invitation.
主语是he所以是正在被邀请故选having invited 便可

Answer 2

1，厅档凯c.是强蠢肢调句型啊
2，b.前面有个助动词（did）,后面就用原型
3，a.如果选how long, 回答的应该是一个短时间，而不是一个表示时间的介词短语。如果是how often，回答的应该是表示频率的词，所以，，，扮唤
4，b.need doing =need to be done
5,a,此句前后主语一致，所以，从句中省略主谓，选INVITED
给我分吧，打字也很辛苦的，，，

Answer 3

C 强调句。 IT IS THAT
A 过去式。与DID并列
B OFTEN 是讲速率，有多频繁，消州FAST适用于文火车汽车的拿蔽蔽速度
C need to be done 或 need doing 表示被动，显而易见C
A 他被邀请，所以是并销被动，AC里面 选A，因为C表示他将要被邀请

Answer 4

1、C
强调句
2、B
nothing but do sth 也是词组的固定用法
这里有两个例子，核散试比较：
The enemy can do nothing but surrender敌人除了投降之外，别无出路
The enemy had nothing to choose but to surrender
3、B
how long是对时间的长短提问，而how often是对事件的频率提问
4、B
need在这里作为实义动词，有三种用法：
人＋need ＋to do
物＋need ＋doing
物＋need ＋to be done
5、D
having done是指现在分词的完成辩者形式作状语,表示这动作在谓语所表示的携氏薯动作之前发生。

Answer 5

c 1. it is not until ...that 固定搭配 直到...才

b 2. do nothing but do 固戚源定尺陆搭配
can do nothing but do
have no choice but to do
have nothing to do but do
前面有do后面不加to

b 3.how long是指多高困态长时间
how often是指频率
很显然，问题问的是时间

b 4.need + doing = need to be done
have是使役动词,have sb do/have sth done

a 5. 被邀请，
when (he was) invited to.....,he ....