16. The computer program is a puzzle to me. The more I think of it, the more questions I think of _____.
| A．ask | B．asked | C．being asked | D．to ask |
With more forests being destroyed, huge quantities of good earth _______ each year.
| A．is washing away | B．is being washed away |
| C．are being washed away | D．are washing away |
This event not only raised _______ of world hunger, but also raised lots of money to help starving children.
| A．information | B．knowledge | C．instruction | D．awareness |
____________ you may be right, I can’t altogether agree.
| A．While | B．As | C．If | D．Since |
The emergency req
uired that all the tasks _____ at least two days ahead of time．
| A．to complete | B．should complete | C．be completed | D．should have been completed |
| A．introducing | B．introduced | C．being introduced. | D．introduce |