英语句子改错It is sure that he will make great progress .哪里错了,怎么改?麻烦说...

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英语句子改错It is sure that he will make great progress .哪里错了,怎么改?麻烦说...
英语句子改错It is sure that he will make great progress .哪里错了,怎么改?麻烦说详细点,

It is sure that he will make great progress .
sure -----certain
It is certain that ...
sure只能用于 I am sure .
不能用it 形式主语.