7. Read, choose and add one more 选同类词并再写一个。

A.excited
B.play the piano
C.Tuesday
D.dumpling

Feelings
worried happy (A) angry
Foods
beef hot dog ()
Days of the week
Monday Sunday ()
Activities
play chess jump rope ()

Foods: D, noodles；Days of the week: C, Friday；Activities: B, play football（补充的同类词答案不唯一，符合对应类别即可）

先按类别匹配选项：①Foods是食物类，beef、hot dog都属于食物，对应选项D（dumpling是食物），补充一个同类食物，如noodles；②Days of the week是星期类，Monday、Sunday都属于星期，对应选项C（Tuesday是星期），补充一个同类星期，如Friday；③Activities是活动类，play chess、jump rope都属于活动，对应选项B（play the piano是活动），补充一个同类活动，如play football。

8. Read and match
Here are forest hiking tips.
Things we should know before forest hiking
1)
2)
3)
A. We should wear the right hiking shoes.
B. Don't go hiking in heavy rain.
C. Bring enough water with you.
D. It's important to bring a jacket.
E. Go with your friends or teachers.
F. Don't make a fire in the forest.

1) B, F
2) A, D
3) C, E

我们先观察每组配图的含义，再和右侧的提示选项逐一匹配：
1) 第一组配图是禁止大雨、禁止森林生火的标识，对应含义匹配选项B（不要在大雨天气去徒步）和F（不要在森林里生火）。
2) 第二组配图是徒步鞋、夹克外套，对应含义匹配选项A（我们应该穿合适的徒步鞋）和D（带一件夹克是很重要的）。
3) 第三组配图是装水的水杯、结伴出行的队伍，对应含义匹配选项C（随身带上足够的水）和E（和你的朋友或者老师一起去徒步）。

9. Read and write
It's important to keep healthy during the trip.
Keep healthy on our trip
We should get enough sleep every day.
We should twice a day.
Always eat breakfast and .
We should every day.
We shouldn't too often.

brush our teeth；drink more water；do exercise（或run）；play with the mobile phone（合理即可）

我们结合每个空旁的提示图标，联系旅行中保持健康的常识，结合should/shouldn't后接动词原形的语法规则填写即可：
1. 第一空旁的图标是牙刷和漱口杯，对应“一天刷两次牙”的健康行为；
2. 第二空旁的图标是盛水的杯子，对应“吃早餐、多喝水”的健康常识；
3. 第三空旁的图标是跑步的小人，对应“每天做运动”的健康要求；
4. 第四空旁的图标是手机，对应“不要频繁玩手机”的健康提示。