1.（选择）These math problems（）before class is over.

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1.（选择）These math problems（）before class is over.
A.had been worked out B.were worked out
C.will be worked out D.have been worked out
2.（用rain的适当形式填空）I don't know if it （）tomorrow,and if it （）,I won't go there.

C
will rain
rains
再问：可以讲解一下吗？
再答： 1刚才没仔细看，第一题应该选D ,后面是一般现在时，前面应该选现在完成时，且要用被动， 2 我不知道明天是否下雨，是将来时，所以用will rain 后面主句和从句都为将来时态时，主句用将来时，从句改为一般现在时， rains ~~~~~~~~~~~~~~~~希望对你有所帮助，望采纳~~~~~~~~~~~~~~~~~~

1.（选择）These math problems（）before class is over. 1.At last we worked out these math problems.（改为同一句,每空一词） Jack is busy _____ （work on）some math problems. art,is,ciass,math,before,class 连词成句（） Class is over . What about _________ football with Class 选择填空（）1.Li Ming （）questions before the class A.dare not to a Math class is not as interesting as English class.(同义句） Class is over,it’s time（）for Sports Day. All these exercises must__ __(finish)before school is over.被 The general manager thought ___ of these problems before he 英语问问 in the math class ,we are ( ) ( ) math problems.括号里应填那两 These day we ___(go) over our math lesson

1.（选择）These math problems（ ）before class is over.

1.（选择）These math problems（）before class is over.