However ____ important school life may be, ___ great influence of parents can’t be ignored or discounted by the teacher.
| A．an; a | B．the; the | C．an; / | D．/; the |
--What’s the problem with the car? Have you checked the engine?
--Yes, I did twice; there _________ be anything wrong with the engine.
| A．won’t | B．needn’t |
| C．mustn’t | D．shouldn’t |
The fans were told that all the tickets had been sold out, ________they had waited outside the booking office for so long.
| A．as | B．since |
| C．unless | D．though |
______ the early train, you’ll have to get up early and rush in a taxi.
| A．caught | B．catching |
| C．catch | D．to catch |
It has been cold and windy recently. If only it ______sunny and clear now!
| A．is | B．should be |
| C．were | D．being |
Madame Curie(居里夫人) contributed all his life ______ radium(镭) so that she has earned respect from people all over the world.
| A．to study | B．to studying |
| C．study | D．studied |