【推荐2】这是我第一次参与这样有趣的活动。(participate)（汉译英）

【推荐3】这些活动不仅帮助我们获得更多的技能，而且教会我们关心他人。(not only…but also…)(汉译英)

【推荐1】用本单元出现的单词或短语的正确形式替换画线部分，保持句意不变。
1. It is OK to be 15 to 30 minutes late in some areas. ________
2. In foreign countries, we need to respect local traditions. ________
3. I entered a chess contest and finished third. ________
4. He brought his chicken to the market. ________
5. I met a childhood friend at the party. ________
6. Some often throw a big party to observe Christmas here. ________
7. Students are required to sit in the front of the conference hall. ________
8. John, a tough man, cried like a baby when he got his lost son back. ________
9. Jack, the owner of this house, introduced us to the other guests. ________
10. Although this idea is very good, not everyone likes it very much. ________

【推荐3】你不必向我解释你的理由。(汉译英)