问题描述：
1.The old man hasn't got a family.He lives _____.(说明一下为什么)
A,alone B,lonely C,oneself D,along
2.This is the nicest picture I have ______ seen.(说明一下为什么)
A,never B,ever C,once D,not.
A,alone B,lonely C,oneself D,along
2.This is the nicest picture I have ______ seen.(说明一下为什么)
A,never B,ever C,once D,not.
问题解答：
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