Nearby were two boats----they had come to the island.A where B by which C in which D with whichHe is absent,____is often the case.A what B which C who D as第一个题正确答案是C ,不太清楚B为什么不对.第二个答案是D,和B有什么区

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Nearby were two boats----they had come to the island.A where B by which C in which D with whichHe is absent,____is often the case.A what B which C who D as第一个题正确答案是C ,不太清楚B为什么不对.第二个答案是D,和B有什么区
Nearby were two boats----they had come to the island.
A where B by which C in which D with which
He is absent,____is often the case.
A what B which C who D as
第一个题正确答案是C ,不太清楚B为什么不对.
第二个答案是D,和B有什么区别?

Nearby were two boats----they had come to the island.A where B by which C in which D with whichHe is absent,____is often the case.A what B which C who D as第一个题正确答案是C ,不太清楚B为什么不对.第二个答案是D,和B有什么区
第一题：后面定语从句的大意是他们是搭这个船来的.船与乘客的关系是人坐在穿里面,用in.by也可用于交通工具,但做这种用法时,其后面应直接加名词单数,没用冠词以及任何形式的变化,如by bike.
第二题：as is often the case可以看作是一个固定短语,as在这里指代的是he is absent.如果用which的话,则为非限定性定语从句,非限定从中,which不能指代前面整个句子.
仅供参考哈.
第二题还不明白的话,建议翻一下语法书,找一下定语从句的用法.

1、这句话的意思是如果附近有两艘船，他们就能到岛上去了。
是句虚拟语气
没有用船的意思
变成正常语序是
They had come to the island，if two boats in which were nearby.
2、as is often the case：情况常常如此；通常就是这样情况常常如此
as is often the ...

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1、这句话的意思是如果附近有两艘船，他们就能到岛上去了。
是句虚拟语气
没有用船的意思
变成正常语序是
They had come to the island，if two boats in which were nearby.
2、as is often the case：情况常常如此；通常就是这样情况常常如此
as is often the case (with)：对…是常有的事
这是固定搭配。。

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Nearby were two boats_____they had come to ……Nearby were two boats_____they had come to the island.横线中为什么不能填by which Nearby were two boats__they had come to the island.Nearby were two boats__they had come to the island.A.where B .by which C.in which D.with which nearby were two canoes in which they had come to the island为什么句子当中要加in For example,two women were vacationing in Longboat Key while they were floating on the rubber boat along the shore这里的while怎么理解啊?这句子的结构是怎样的？ the boat won the race by two length. the woman went to the supermarket nearby to buy ___egg a two dozens b two dozen c two dozen of if ever two were one ,those two were At a ________ table people were talking loudly.nearby nearly nearest near The injured men were sent to a nearby hospital .为什么不能用near? We u____ to swim in the nearby lake when we were children. I had lived there f__ nearby two years.横线处填哪个单词? many of those ---- in the fire were taken to the nearby hospital.have injured injuring were injured injured Nearby were two boats----they had come to the island.A where B by which C in which D with whichHe is absent,____is often the case.A what B which C who D as第一个题正确答案是C ,不太清楚B为什么不对.第二个答案是D,和B有什么区高一英语用介词+关系代词填空Can you see the speaker_________ ___________ comes the voice,Can i help you?I will never forget the days_________ _________ we worked together in a foreign country.Nearby were two boats__________ ________ the Bill and Simon were good freends.One summer they were on (h ).They wanted to sail aroundthe Caribbean Sea in their boat for two weeks.During their trip,they saw many whales.Bill and Simon werevery (e ) because they had wanted to see them very much.U A young couple in a boat were eating属于什么用法和A young couple were eating in a boat 有什么区别。 They were lucky.They won the dragon boat races at last.(保持句意不变）They were()()to win the boat races at last. 首字母填空 Shortly after the accident,the i___ were taken to the hospital nearby to……Shortly after the accident,the i___ were taken to the hospital nearby to receive medical care.