求.when,while,各两题.(最好能表明答案和为什么)谢谢.

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求.when,while,各两题.(最好能表明答案和为什么)谢谢.
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求.when,while,各两题.(最好能表明答案和为什么)谢谢.
求.when,while,各两题.(最好能表明答案和为什么)谢谢.

求.when,while,各两题.(最好能表明答案和为什么)谢谢.
1.Much hard ________ he tried,he flailed to catch up with the first runner.
A.although B.as
C.while D.when
2.We were just ________ calling you up ________ you came in.
A.about; when B.on the point of; while
C.on the point of; when D.on the point of; as
3.Most animals have little connection with animals of a different kind,________ they hunt them for food.
A.if B.while
C.unless D.as
4.________ he thought he was helping us with the work,he was actually in the way.
A.Although B.Unless
C.Because D.When
5.Babies sleep l6 to l8 hours in every 24 hours,and they sleep less ________ they grow older.
A.while B.as
C.when D.after
6.I have been keeping the portrait ________ I can see it every day,as it always reminds me of my childhood in Paris.
A.since B.where
C.as D.if
1.B.因为as引导让步状语从句,要求将从句的表语或状语等放到句首.而although,while表示让步时,都用正常语序;另外,though引导的让步状语从句,其表语或状语等可提前也可不提前.
2.C.因为表示“正要做某事时,突然又发生另一件事”的句型是:was /were just about to do sth.when…did…或was /were just on the point of doing sth.when…did…
3.C.unless“除非、如果不”.句意是:大多数动物与其它不同种类的动物都没有什么联系,除非是把它们猎为食物.
4.A.句意是:虽然他认为他在帮我们做工,但事实上他是在挡事.
5.B.表示主、从句的谓语动词同时变化的“随着…”只能用as.
6.B.因为keep the portrait (把照片放在…)后面一定是指所放的“地方”了,所以用where (在…的地方) 引导一个地点状语从句.
如果还需要

When you are bored,you play PSP!
When I am sad,Iplay the guitar .
While my mom is watching out the window,I sneak out.
While the sun is falling ,I watch it .
As you known , I am a teacher.
As you though , this is correct.