___ well prepared you are , you still need a lot of luck in mountain climbing.
| A．however | B．whatever | C．no matter | D．although |
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 |
—Have you heard that he was admitted into Beijing University?
—Is that true? And I'm glad that his efforts at last ___．
| A．took off | B．paid off | C．turned out | D．paid for |