The light happened to _______.
| A．go out | B．put out | C．come out | D．take out |
—I failed again. I wish I _________ harder.
—But you _________.
| A．had worked; hadn’t | B．worked; don’t |
| C．had worked; didn’t | D．worked; didn’t |
Drunk driving used to occur _______, but now it is under control.
| A．generally | B．frequently | C．practically | D．gradually |
It gives his life a flying start ______ he has gone abroad for further education.
| A．what | B．when | C．that | D．how |
The experiment has_________ the possibility of the existence of any life on that planet, but it does not mean there is no life on other planets.
| A．found out | B．pointed out | C．ruled out | D．carried out |
What is the best way you can imagine ______the overuse of water in our school?
| A．reducing | B．to reduce | C．reduced | D．reduce |