_____ the government agrees to give extra money , the theatre will have to close.
| A．Until | B．Unless |
| C．Since | D．While |
------Flight 302 to London_______ until 7:30 tomorrow morning.
-----No wonder I hear so many complaints from the passengers.
| A．has been delayed | B．delay | C．delayed | D．will be delayed |
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 |
Many people complain of the rapid _____ of modern life.
| A．rate | B．pace | C．speed | D．growth |
She has lost her handbag with the _____ sum of $150 in it.
| A．extraordinary | B．important | C．considerable | D．valuable |
Russia's withdrawal of its experts from China did not strangle (压垮) the Chinese people; _____ it stirred up their enthusiasm for greater exertions.
| A．on the other hand | B．on the contrary | C．to the contrary | D．in consequence |