Understanding the cultural habits of another nation，especially ________containing as many different cultures as America，is a difficult thing.
| A．the one | B．one | C．it | D．either |
One way to species under' threat of extinction - whatever the cause - is to remove them to zoos and parks and breed them there．
| A．betray | B．resist | C．preserve | D．dispute |
Having heard wolves howling in the forest, Lala her walk up the path to the caves fearing that there might be wild beasts lying in wait for her．
| A．accumulated | B．circulated | C．accelerated | D．calculated |
Smiling doesn't mean you're happy． Sometimes, it just means that you're strong enough to face problems．
| A．fortunately | B．eventually | C．deliberately | D．necessarily |
The officials of the National Ministry of Information Industry advise people to limit the personal information they make about themselves online．
| A．available | B．affordable | C．acceptable | D．valuable |
In order to be a strong and effective partner with the Asia Pacific region, American president Obama thinks it absolutely to have a strong relationship with China．
| A．vital | B．potential | C．specific | D．awkward |