问题
Why not ____ your teacher for help when you can’t finish _____ the story by yourself
A:is, is
B:is, are
C:are, are
D:are, is;
B:is, are
C:are, are
D:are, is;
正确答案是：
同类题型
When changing lanes, a driver should use his turning signal to let other drivers know____. [ ]
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