一卷：

1 machines2. strong3 pense

4. exessay5 faced 6 . physical7. students

8. For another9. their 10. doing more exercise

二卷：

1 minutes2. Internet 3 picture 4. directly5 communication6 . others7. have8. each 9. virtual 10. should strike

三卷：

题目 secret of...

1.free roots 2. the universe 3. wants 4.complete 5.an inspire 6.he command 7.eat 8.closed and inflexible 9.combined 10. she started

四卷：

1、earth 2、found 3、plant and animal.4、 Because they can help5、Because of human6、 the conservation of 7、increase species 8、the likelihood of soil erosion, landslides and floods9、 the forest is key to many of the planet's natural cycle, such as carbon and water cycles

五卷：

1.C go to hospital 2. B relieve pressure 3.A classification4. B to put every task 5. C) Enjoy doing gardening 6.C stress better 7. A) one should escape 8.recharge and reflect yourself 9.supportive friends 10.mosquito

六卷：

1.Teamwork 2.really 3.modern 4.society 5.cooperate 6.spent 7.study 8.develop 9.team 10.playing team