Were it not for their assistance, we __________（不会有资格)this honorable award right now.

The legal document of patent is actually known as _______.

An inventor dose not have a right to a patent unless he or she has fulfilled his or her __

____________ (由于激烈竞争) among the airlines, travel expenses have reduced dramatically.

When I feel blue, I listen to music and I will soon _____________ (心情会好起来).

______(让我一直困惑) is why she is so attractive but still single.

I must admit that______(适应新的环境不容易).

The incidence of HIV infection will likely be worsened by ______ in China.

The number of AIDS cases in ______, far exceeds that of all other geographic regions.

Though bicycles run more slowly than cars, they are very ______.(方便实用)

This is by no means the best way ______.(解决能源危机)