题目内容：

Mary is very young ,but she knows a lot
____Mary is very young,she knows a lot
2.Why don't we go hiking this weekend?
__ ___go hiking this weekend?
3.Li Ming watches TV once or twice a week.对once or twice 提问
____ ____ ____ ____ Li Ming watch TV a week?
4.I finished my homewok .Then I went to bed,合并为一句
I____ go to bed _____I finished my homework

优质解答

Although.
Why not
How much times does
didn't until