Hurry up; it is required that we ______ at six.
| A．will arrive | B．arrived |
| C．arrive | D．would arrive |
When a space shuttle has accomplished its _____, it can be ready for another trip in about two weeks.
| A．venture | B．mission | C．commission | D．responsibility |
People cannot but feel _____, for they simply cannot understand how he could have made such a stupid mistake.
| A．puzzled | B．delighted | C．induced | D．inspired |
What makes the space shuttle _____ is that it takes off like a rocket but lands like an airplane.
| A．exceptional | B．strange | C．unique | D．rare |
Alice was very sorry to hear that her grandmother had _____ two days before.
| A．broken off | B．passed off |
| C．given away | D．passed away |
Comrade Li Dazhao, _____ librarian of Beijing University, was one of the founders of the Chinese Communist Party.
| A．sometimes | B．sometime | C．some time | D．some times |