帮忙解释几道英语题~~谢啦

1.ItwasnotuntilDecember31__________weheardfromhim.A.whichB.whenC.thatD.then2.Atonetim... 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
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月亮的落落雪
2011-01-23 · TA获得超过5921个赞
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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,所以要用How long ,How often是问多经常。一般回答是每隔多久才去一次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
jessicatangjie
2011-01-23
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1,c.是强调句型啊
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,,,
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,,,
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鼻涕虫魔法
2011-01-23 · TA获得超过289个赞
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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,FAST适用于文火车汽车的速度
C need to be done 或 need doing 表示被动,显而易见C
A 他被邀请,所以是被动,AC里面 选A,因为C表示他将要被邀请
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素雪缥沫香
2011-01-23 · TA获得超过716个赞
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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,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形式作状语,表示这动作在谓语所表示的动作之前发生。
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agoodgirl
2011-01-23
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c 1. it is not until ...that 固定搭配 直到...才

b 2. do nothing but do 固定搭配
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 ....
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