15. A world-famous ballet company’s 42-year absence from Beijing will end it brings a new production to the stage this week.
| A．since | B．when | C．unless | D．until |
I always take something to read when I go to the doctor`s ____I have to wait.
A. in caseB so thatC in orderD as if
－You couldn’t have chosen a better way to solve the issue, I think.
－________________.
| A．Well, nothing much | B．Oh, don’t complain about it |
| C．Sorry, but I’ll find a better one | D．Thanks a lot. |
The scientists are able to ____________ accurately when the spaceship will reach the moon.
| A．accumulate | B．calculate | C．appoint | D．estimate |
－Can I pay the bill by check?
－Sorry, sir. But it is the management rule of our hotel that payment ______ be made in cash.
| A．shall | B．need | C．will | D．can |
The driver got out of the car_______it caught fire .
| A．directly | B．that | C．unless | D．until |