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1.Although he failed,he tried____time.

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1.Although he failed,he tried____time.
A.the second B.a second C.many D.more.
2._____is known to everbody,the moon travels round the earth once every month.这道题我选A.我对于这类题目比较不会做.
A.It B.As C.That D.What
3.It is such a difficult problem ______no one can work out.这道题我选A.
A.as B.that C.which D.so that
1.Although he failed,he tried____time.
第一题应该选B 因为the+序数词 表示的是:第几,a+序数词+名词 表示的是 :又,再
第二题as is known to everybody--众所周知
选B
第三题选a such ...as 的句型