Only when they were told of the importance of time ________ wasting time is like wasting part of their lives．
| A．those boys realized | B．those boys had realized |
| C．had those boys realized | D．did those boys realize |
Changing the design of a new product may ______ the risk of its production in the market.
| A．bring about | B．come about | C．bring up | D．come up |
Why don’t you ______ it to his attention that you are too busy to go on working?
| A．pay | B．fix | C．bring | D．draw |
No sooner ______ down on bed ______ the telephone rang.
| A．had he lain, than | B．had he lied, when |
| C．did he lie, than | D．had he laid, before |
He never thought that his success came ______ he least wanted it.
| A．until | B．since | C．when | D．while |
______ in the regulations is that you _____ other people the password of your e-mail account.
| A．What is required; not tell | B．As is required; shouldn’t tell |
| C．It is required; not tell | D．It requires; shouldn’t tell |