（1）she always checks her exercises to ( ) there are no mista
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（1）she always checks her exercises to ( ) there are no mistakes
A.make sure B.think up c.work out
（2）the woman who ( )wearing black shoes ( )my mother
A.are ,are B.is,is c.are ,is D.is are
优质解答：
1A
2B
make sure 确保
think up 想出
work out 做出
第二题第一空主语是the woman,所以都用is
和后面的shoes无关的