The mother saw his son________ (fall) off the bike and________ (lie) on the ground.

I prefer staying at home alone to________ (see) the film with my parents.

Read the text carefully and fill in the blanks with proper prepositions or adverbs(仔细阅读课文，填写适当的介词或副词)

1. Life __________ the oceans ranges __________ the tiniest plankton all the way __________ __________ giants __________ sharks and whales.

2. The nutrients __________ whatever falls __________ the ocean will quickly become available __________ other living creatures.

3. Water can absorb and release a lot __________ heat __________ big changes __________ its temperature, thus creating a stable environment.

4. If the ocean is the source __________ life __________ earth, then the estuary is our planet’s nursery—a transition zone __________ the land and sea.

5. Estuaries provide both recreation and education __________ human beings. Estuaries also contribute __________ the economy __________ tourism and fishing.

1. 边远地区______________

2. 给某人……印象______________

3. 平均______________

4. 来到某处；流入, 进入______________

5. 大陆桥______________

6. 断开______________

7. 为某事负责______________

8. 遗漏；省略______________

9. 就某事投票______________

1. 属于______________

2. 作为回报, 作为报答______________

3. 与某人握手______________

4. 自我介绍______________

5. 打算做某事______________

6. 按……顺序______________

7. 得出结论______________

8. 推荐______________

9. 以……为基础/根据______________

1. 成为现实, 实现______________

2. 人类______________

3. 航天飞机______________

4. 与……有联系______________

5. 编写连环画______________

6. 进行一次调查______________

7. 被分成……部分______________

8. 代替, 取代______________

9. 指出______________

1. 负责, 掌管______________

2. 发言, 演讲______________

3. 外层空间, 外太空______________

4. 发射飞船到太空______________

5. 前苏联______________

6. 采集样本______________

7. 梦想, 向往做某事______________

8. 实行, 执行, 贯彻______________

9. 接走某人______________

1. 根据, 按照______________

2. 满月______________

3. 拉开窗帘______________

4. 对某人或某事进行研究 ______________

5. 从头顶上飞过______________

6. 排除……的可能性______________

7. 调查______________

8. 编故事______________

9. 以倒金字塔的格式______________

1. 偶尔撞见______________

2. 一双, 一对______________

3. 加紧, 加快搜索______________

4. 失踪______________

5. 对某事表现出极大的兴趣 ______________

6. 由于, 因为______________

7. 出现, 露面, 到达______________

8. 为某事作好准备______________

9. 播放某人喜爱的CD______________

10. 以……开始______________

对……有热情______