It is vital that every piece of equipment ________ checked before the experiment.
| A．would be | B．must be |
| C．should be | D．might be |
The audience ______ when they heard the humorous story.
| A．burst into laughing | B．burst out laughter |
| C．burst into laughter | D．burst in laughing |
—I’m sorry．That wasn’t of much help．
— Oh, _______ . As a matter of fact，it was most helpful．
| A．sure it was | B．it doesn’t matter | C．of course not | D．thanks anyway |
— What about ______ lecture you attended yesterday?
— To tell the truth, it was too boring．I can't stand ______ lecture like that．
| A．a; the | B．the; a | C．the; 不填 | D．the; the |
_____the Internet is of great help, I don’t think it’s a good idea to spend too much time on it.
| A．If | B．While | C．Because | D．As |
It was a matter of________ would take the position.
| A．who | B．whoever | C．whom | D．whomever |