Before traveling in space, you must know what it might feel like_____in an imaginary environment.
| A．to travel | B．traveling | C．to be traveling | D．travel |
_______we’ll go camping tomorrow depends on the weather.
| A．If | B．Whether | C．That | D．Where |
It worried her a bit_______her hair was turning grey.
| A．while | B．what | C．if | D．that |
As we all know, Asia is_______ Europe.
| A．four times the size of | B．the size four times of |
| C．four times the size as | D．four times as the size of |
Tom_______two of his classmates_______invited to the party.
| A．as well as; was | B．as good as; were | C．and; have | D．as well; has been |
—Are you worried about her safety?
—Just_______. She isn’t alone.
| A．entirely | B．gradually | C．generally | D．slightly |