—It’s late. I must leave now.
—OK.
| A．Thank you | B．Take care. | C．I’m sorry for it. | D．Don’t worry. |
She must be in the classroom, ?
| A．isn’t she | B．mustn’t she | C．can’ t she | D．does she |
and I’ll get the work finished.
| A．Having one more hour | B．One more hour |
| C．Given one more hour | D．If I have one more hour |
— It’s said that dam is under construction.
— Yeah. It will take about half a year.
| A．不填；不填 | B．a; 不填 | C．a; the | D．不填； the |
Once harm ______ to the environment, it takes years to have the system recovered.
| A．does | B．is done | C．will be done | D．be done |
Staying in a hotel in Shanghai one day costs ____ renting a house in my hometown for a week.
| A．the three times price of | B．three times the price of |
| C．as much as three times | D．as much three times as |