![](https://lstatic.shangxueba.com/sxbzda/h5/images/m_q_title.png)
[单选题]
We can imagine () interesting it must be to travel in space.
A.what
B.where
C.how
D.that
![](https://lstatic.shangxueba.com/sxbzda/h5/images/tips_org.png)
A.what
B.where
C.how
D.that
第1题
A、waited
B、had been waited
第2题
A、that
B、which
C、who
D、of which
第3题
A、studies
B、is studying
C、studied
D、has studied
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!