David knocked at the door for nearly half an hour______Mary opened it, unwilling.
| A．when | B．while | C．until | D．before |
—Would you mind giving your advice on how to improve our business management?
—If you make_____most of the equipment，there will be_________rise in production．
| A．不填；不填 | B．the；a | C．不填；a | D．the；不填 |
—How was your job interview?
—Oh，I couldn’t feel _______．I hardly found ______ answers to most of the questions
they asked．
| A．better，exact | B．easier，adequate |
| C．worse，proper | D．happier，urgent |
Will you see to ______ that the luggage is brought back?
| A．me | B．them | C．it | D．yourself |
Very often, it_____ me that I have left the key indoors when I’m about to lock the door．
| A．strikes | B．reminds | C．occurs | D．mentions |
The storm________，they had to live in a cave．
| A．has destroyed their hut | B．to destroy their hut |
| C．having destroyed their hut | D．destroying their hut |