The man downstairs found___very difficult to get to sleep.A that B them C it D its
问题描述：
The man downstairs found___very difficult to get to sleep.A that B them C it D its
答
答案选C
当不定式作宾语,宾语后面还有补足语时通常用it作形式宾语,而把真正的宾语（不定式）放在句末
例：
I found it difficult to learn English
He found it hard to catch up with his class