3. The        (frontier) of medical knowledge are being pushed forward as time goes on.

2. What has        (motivate) you to do such a thing?

1. It is another accomplished        (work) by the artist.

5. 從那家公司辭職后，湯姆開始賣保險。

After he resigned from that company,Tom       insurance as a profession.

4. 吸煙能導(dǎo)致多種疾病。

Smoking can        many diseases.

3. 我代表我的妻子感謝你。

      my life,I thank you.

2. 他跑得很快，把我拋在后面了。

He ran so fast that he       ,

1. 你明天就要去上海嗎？

Are you        Shanghai tomorrow?

8. We were greatly        (鼓舞) by his heroic deeds.

7. The robbers        (逃跑) when they saw the police.