— The window must have taken you quite a lot of time that day.
— Right. They____ for weeks.
| A．haven’t been cleaned | B．hadn’t been cleaned |
| C．didn’t clean | D．haven’t cleaned |
We began to open to the outside world in the late 1970s.,there have been great changes in the country.
| A．As a result of | B．As a result | C．First of all | D．After all |
Hurry up! Flight 4406 off at 18:40.
| A．takes | B．took | C．will be taken | D．has taken |
Tom hasn’t come to work since last Friday. he have had an accident?
| A．Must | B．Could | C．Should | D．Might |
To know more about Japan’s recent claims about Diaoyu Islands, you can use the Internet or watch CCTV news, or .
| A．both | B．none | C．some | D．neither |
The Chinese have uneasy feeling about increasing use of foreign words.
| A．the; the | B．an; a | C．an; the | D．the; a |