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 |
相关试题
After supper she would sit down by the fire , sometimes for _____an hour ,
thinking of her young and happy days.
| A．as long as | B．as soon as | C．as much as | D．as many as |
It was several minutes before I was ____ of what was happening.
| A．fond of | B．realized | C．aware of | D．prepared of |
All their attempts to rescue the child from the burning building were _____.
He died soon afterwards.
| A．in place | B．in return | C．in vain | D．in order |
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