Most of the factories under ___________ have been designed by Chinese engineers.
| A．conclusion | B．control |
| C．construction | D．contribution |
After completing and signing it, please return the form to us in the envelope ________.
| A．providing | B．provided |
| C．having provided | D．provide |
The manager was concerned to hear that two of his trusted workers ______.
| A．will leave | B．are leaving |
| C．have left | D．were leaving |
Be- you can't expect me to finish all this work in so little time.
| A． | reasonable | B． | confident |
| C． | creative | D． | grateful |
A number of high buildings have arisen _______ there was nothing a year ago but ruins.
| A．when | B．where |
| C．before | D．until |
- I don't know about you, but I'm sick and tired of this weather.
-. I can't stand all this rain.
| A． | I don't care | B． | It's hard to say |
| C． | So am I | D． | I hope not |