It is uncertain____side effect the medicine will bring about，although about two thousand patients have taken it.
| A．that | B．what | C．how | D．whether |
It is believed that a new kind of drug _____ by the scientists and they are hopeful that they will succeed in a few months．
| A．has been developed | B．is being developed |
| C．is developing | D．has developed |
The speaker raised his voice _____ make himself _____ by the listeners．
| A．so that; heard | B．in order to; hearing |
| C．so as to; heard | D．to; to be heard |
We waited and waited．________ we had been looking forward to．
| A．Then came the moment | B．Then did the moment come |
| C．Then the moment came | D．The moment then came |
The living room is clean and tidy, ________ a dining table already laid for a meal to be cooked．
| A．as | B．which | C．with | D．That |
Being injured in the leg made _______ impossible for him to walk his way home．
| A．that | B．which | C．it | D．One |