1 . 请判断下列句中while引导的句型的类别
1. While the sun’s rays can age and harm our skin, they also give us beneficial vitamin D.
2. Corn production has jumped nearly 125 percent over the past 25 years, while rice has increased only 7 percent.
3. Don’t forget to stop by Pacific Science Center’s Store while you are here to pick up a wonderful science activity or souvenir to remember your visit.

2 . 选择填空：even if/as if
1. When fat and salt are removed from food, the food tastes ________ it is missing something.
2. My grandfather still plays tennis now and then, ________ he's in his nineties.
3. ________ serving insects as dishes is common in some parts of the world, to many people, the thought of eating them is rather disgusting.

3 . 当我们试图发现他人的优点时，不知不觉中自己的优点也会得到彰显。
________________ the best in others, we somehow bring out the best in ourselves.

4 . 只要你答应不开得太快；我可以把车借给你。
You can borrow my car ________ you promise not to drive too fast.

5 . 人类不同于动物，因为人类可以把语言作为交流的工具。
Human beings are different from animals ________.(in that)

6 . 当我第一次踏入大学校园时，我不知道未来等待我的会是什么。(汉译英)

7 . 如果你坚持下去，你迟早会成功。祝你考出好结果。(in time) (汉译英)

8 . 你如果花太多时间上网，也许会发现很难在学习上集中精力。(汉译英)

9 . 当他到达这个山村后，他发现这里的村民面临着干净的饮用水短缺的问题。(汉译英)

10 . 事实上，我每次开车路过，都会到那儿拜访他。
As a matter of fact, ________________, I would visit him there.