单项选择题

I don't know ______ he will come tomorrow. ______ he comes, I'll tell you.

A． if; If
B． if; Whether
C． whether; Whether
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单项选择题
She can't dance ______ the music by now.
A． along
B． to
C． with
单项选择题
The dentist said there wasn't ______ wrong with her teeth.
A． anything
B． nothing
C． something
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