1 . 一听说我们学校要举办成人礼（the coming-­of­-age ceremony），我高兴地跳了起来。
①________________, I jumped with joy.
②________________, I jumped with joy.

4 . 我认为有规律地锻炼身体很重要，因此我们学生必须积极准时地上体育课。
________________, so we students must have PE class actively and punctually.

6 . What is the function of the -ing form in each of the following sentence?
1. As you can imagine, getting burnt can lead to very serious injuries.
2. The first and most important step in the treatment of burns is giving first aid.
3. It is best to place burns under cool running water, especially within the first ten minutes.
4. Remove any clothes using scissors if necessary, unless you see the fabric sticking to the burnt skin.
5. You can protect the burnt area by covering it with a loose clean cloth.

8 . 常言道， “独木不成林”，我们的成功建立在与他人合作的基础上。
Just as the saying goes, “One tree doesn't make a forest”,   ________________.