The number of the employees has grown from 1,000 to 1,200. This means it has risen ____ 20 percent.
| A．by | B．at | C．to | D．with |
Returning to my room, ________.
| A．my watch was missed | B．I found my watch missing |
| C．I found my watch disappearing | D．I found my watch losing |
After going into the concert hall, the mother ________ a friend and went over to greet him.
| A．searched | B．knew | C．realized | D．spotted |
He was reading a novel ________ the story reminded him of ________ he had seen during the last war.
| A．when, what | B．that, what | C．whose, that | D．while, which |
The reason ________ she gave for not being present was ________ the heavy snow prevented her coming.
| A．why; because | B．why; whether | C．that; that | D．how; that |
Does the way you thought of ________ the water clean make any sense?
| A．making | B．how to make | C．to make | D．having made |