问题描述:
what is to be done then 与what is doing then哪种说法正确
还有:learn to do 与learn doing 两种表达都对吗,有什么区别?
a child can't learn ______ (spell) without being helped.这里该填哪种?
还有:learn to do 与learn doing 两种表达都对吗,有什么区别?
a child can't learn ______ (spell) without being helped.这里该填哪种?
问题解答:
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