If these measures can’t help ______such a tragedy from happening again, what’s the sense of taking them?
| A．prevented |
| B．being prevented |
| C．preventing |
| D．to prevent |
Don’t be nervous. Just speak _______ and pretend the microphone isn’t here.
| A．obviously | B．slightly | C．naturally | D．strangely |
You can’t complain of being lonely _______ you don’t make any effort to meet people.
| A．until | B．when | C．once | D．though |
Our country are working even harder now to _______ the gap between the developed countries and ours.
| A．short | B．narrow | C．slow | D．wide |
“Drive-ins” have large parking lots ______ customers are served in their cars by waitresses.
| A．who | B．when | C．which | D．where |
Although it _________ in the desert most of the year, people still live there.
| A．doesn’t rain | B．didn’t rain | C．hasn’t rained | D．hadn’t rained |