1.Do you know the reason ______ he is trying to keep as a se

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1.Do you know the reason ______ he is trying to keep as a secret?
A.for B.why C.that D.because
选C为什么不选B?
2.We used to be good friends.We were always doing what we could _____ each other.
A.help B.helping C.to help D.helped
为什么选C不选A?
3.What made the teacher angry was not what he said but _____ he said it.
A.the way B.in the way that C.in the way D.the way which
为什么选A不选B?
4.They must have decorated the classroom all by themselves yesterday,_____?
A.mustn't they B.haven't they C.didn't they D.has it
为什么选C不选B?这个不是现在完成时吗?

1.如果用why,从句中内容应为具体的原因,在此句中reason在定语从句中做keep的宾语,用that
2.to help each other为不定式做目的状语,help在此句中不是could后的动词,what we could是一个单独的宾语从句.翻译为：我们总是做一切我们能做的,去互相帮助.
3.the way指让老师生气的事情,要用一个名词而不是介词短语
4.情态动词+完成式这个结构表对过去事情的推测,完成时在这里只是一个形式并不是完成时态,
这是英语中的固定用法.

Do you know the reason-----he was late for school. 】Do you know the reason ____ he was late? you are sure to succeed ( )you keep trying. A.as long as B.w 1.-Do you know ______country he ______ next week?-The U.S.A. Do you think the reason ( ) he gave.is bel he is trying to draw a house on the blackboard 一到英语选择The TV is broken.Do you know ______? A.what to mend B. Do you know what he is ______ over there ? A .tal 定语从句do you know the reason why he didn't come? Do you know the reason why/for which he didn't come?这句话的意思? Do you know the reason ( )he gave for being absent from scho Do you know where Tom is?-He is (likely to be true)in the re