3 . 用方框内的短语的适当形式填空

be regarded as;   refer to;   date back to;   suffer from;   take part in

1. We __________ a voluntary activity organized by our school last Sunday.
2. They are not only __________ the virus, but also faced discrimination (歧视).
3. The president spoke at the business meeting for nearly an hour without __________ his notes.
4. My uncle has a vase, which __________ the Tang Dynasty.
5. Han Hong ___________ a good person for her rich life experience and kindness.

4 . 从方框中选择词组并用其适当形式完成句子。选项中有两项为多余选项。

1. _________, China has successfully launched six manned space ships, with Yang Liwei being the first Chinese astronaut in space and Liu Yang the first woman astronaut in the Chinese history of aviation.
2. Driving in the National Parks，you'll constantly read prominent signs that warn you _________ passing wildlife.
3. At the Press Conference, reporters from the key media raised several questions _________ the latest policy on targeted poverty alleviation(精准扶贫).
4. If some chemical waste is not properly _________, there will be an ecological catastrophe as in the case of the groundwater contamination(污染)with chromium-6 in Hinkley, where, even 20 years after, those few who stay there are still struggling to find resolution to safe drinking water.
5. The local farmers are seemingly sufficiently _________ their loss of land. Yet, once the land is taken, they’ll lose an important source of income while their lack of work skills often makes it hard for them to find a decent job in town.
6. The police _________ and the demonstration shortly stopped after they arrived. The crowd dispersed(散开)and life in the neighborhood streets quickly returned to normal.
7. _________, ours is a glorious defeat. We did our best and our rival was really powerful.
8. The police were checking drunk driving tonight in the street and Mr. Harrison _________ be passing by in his car after a sip with his friends. Luckily, he wasn’t behind the wheel.
9. The investors _________ the risks involved in the project but they decided to make the investment anyway as a support for start-ups.
10. Shiela must have been _________ to have promised to marry Frankie, who, most of us think, is such an unreliable person.