To be an astronaut, you must not only be strong in mind, but also be sound mentally and___.
| A．eventually | B．willingly | C．potentially | D．physically |
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You should be more careful, _______ you might meet with some accident.
| A．meanwhile | B．otherwise | C．although | D．however |
One _______ fact is _______ Crystal always keeps a toothbrush in his pocket for good luck when he is the host of the Academy Awards.
| A．little-knowing ; 不填 | B．well-known ; which |
| C．little-known ; what | D．little-known ; that |
The UN is _______ countries that want to increase peace.
| A．made of | B．consisted in | C．made from | D．made up of |
--- I will go to your place at 3:00 tomorrow afternoon.
--- I’m sorry, but I ______ to Beijing by then.
| A．am flying | B．have flown | C．will have flown | D．will fly |
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