The basketball match will be put off if it ________.
| A．will rain | B．rained | C．is raining | D．rains |
. She has lost her handbag with the _____ sum of $150 in it.
| A．extraordinary | B．important |
| C．considerable | D．valuable |
. Many people complain of the rapid _____ of modern life.
| A．rate | B．pace | C．speed | D．growth |
. The government is _____ and will take the necessary steps to maintain security and stability.
| A．on the alert | B．out of control |
| C．on guard | D．in vain |
Carl wanted to play a joke on Bob but gave himself _____ by laughing.
| A．away | B．in | C．out | D．up |
The rapidly growing birth rate brings about a lot of environment problems, which the government is supposed to take _____.
| A．significantly | B．severely | C．earnestly | D．seriously |