. --Can I help you?
--I'd like to buy a present for my father's birthday, ___________ at a proper price but of great use.
| A．one | B．anyone | C．that | D．everything |
The man stopped from time to time _____whether he was being followed
| A．as if found | B．as to find | C．as if to find | D．when found |
．Chinese people were so excited when they saw president Hu ____the PLA on the National Day of 2009.
| A．inspect | B．check | C．observe | D．examine |
It was in Japan that the atomic weapon was used in 1945, and the power ____increased enormously ever since .
| A．is | B．has been | C．was | D．had been |
Only after you have known someone for some time _____to appreciate his real worth.
| A．do begin you | B．you do begin | C．do you begin | D．begin you |
----How useful do you think the Internet is as a_____ of information?
----I think it is fairly useful, but a lot of the information you find online is false.
| A．resource | B．source | C．tank | D．storage |