Neil Armstrong was the first man ______ on the moon in July 1969.
| A．landing | B．landed | C．to land | D．lands |
According to the newly-made traffic regulation, whoever drives through red lightbe fined at least 200 dollars．
| A．shall | B．may | C．would | D．should |
He is very popular among his students as he always tries to make them ____ in his lectures．
| A．interested | B．interesting | C．interest | D．to interest |
I'm afraid I'm not ___ to help with the show, for I am fully occupied with my own project
| A．dependable | B．convenient | C．available | D．accessible |
—Should I lock the lab before I go home?
—__．I'll check it myself later．
| A．Go ahead | B．No problem | C．No hurry | D．Don't bother |
Thanks to our ___ schedule, we got our task accomplished ahead of time．
| A．active | B．flexible | C．positive | D．fixed |