题目内容
Tom has found ________ difficult to learn English well.
- A.it
- B.that
- C.this
- D.them
A
解析:
A it在本句中代替后面的动词不定式作形式宾语,而其他单词没有这项功能。
解析:
A it在本句中代替后面的动词不定式作形式宾语,而其他单词没有这项功能。
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