第二部分：知识运用（共两节, 满分35分）
第一节单项填空（共15小题；每小题1分，满分15分）
请认真阅读下面各题，从A、B、C、D四个选项中，选出最佳选项,并在答题卡上将该项涂黑。
It is believed that ______ European chemist called Felix Hoffmann first produced ASA which completely changed ______ man’s understanding of aspirin.
A. an; a B. the; a C. a; / D. an; /
The education of ______ young is always ______ hot and serious topic.
| A．不填, 不填 | B．the, a |
| C．不填, the | D．the, 不填 |
Apartments in cities can be quite high. Renters are paying up to $1,000 per month for _______ bedroom apartment.
| A．one a | B．the one | C．one | D．a one |
As _______ unemployment is very high at the moment, it’s very difficult for people to find _______ work.
| A．the, 不填 | B．不填，不填 |
| C．the, a | D．an, the |
He spent too much time talking on ______ phone while we were all busy at _____ work.
| A．the, 不填 | B．a, 不填 |
| C．不填, 不填 | D．the, the |
As is known to us all, _____ tiger is in _____ danger of becoming extinct.
| A．the, a | B．the, 不填 |
| C．a, 不填 | D．不填, the |