He is good at maths and it won’t be long ____ he works out the problem.
| A．since | B．until | C．before | D．when |
The science of computer, _______rapid progress has been made in recent years, is the most important of all science.
| A．which | B．with which | C．in which | D．to which |
-----Can you come for dinner on Sunday or Saturday?
-----I’m afraid _______ day is possible.
| A．either | B．neither | C．some | D．any |
It is not just the size of the Olympic Games ___makes them unique, but ____they mean to us .
| A．which, that | B．that, what | C．that, because | D．that, that |
-----Now, where is my ticket ?
-----______. We will be late for the film.
| A．Take it easy | B．Come on | C．Don’t worry | D．Take your time |
The astronauts started their journeys in rockets _____ forward by jets of hot gas.
| A．drove | B．driven | C．driving | D．to drive |