1. They (eat)……………………everything by the time I (arrive)…………………at the party.2. By the time I (get)……………………..into town, the shops (close)………………..3. The child (sleep)………………………..before 9 p. m last night.4. Yesterday John (go) to the store before he (go) home.5. She (leave)………………………here before 1975.6. After they had gone, I (sit) down.7. They went home after they (finish) their work.8. Before she (watch) TV, she had done all her homework.9. Before I ………………(leave) for work yesterday, I ………………..(turn) off the lights.10.After they ……………………….(have) acquaintance for 5 years, they …………..(get) married last summ

1.They ate everything by the time I arrived at the party.

2.By the time I got into town, the shops closed.

3.The child sleeps before 9 p.m last night.

4. Yesterday John went to the store before he got home.

5. She left here before 1975.

6. After they were gone I sat down.

7. They went home after they finished their work.

8. Before she watched TV, she hand done all her homework.

9. Before I left for work yesterday, I turned off the lights.

10. After they had acquaintance for 5 years, they got married.

Explanation:

1. c. zone of saturation, water table, zone of aeration

2. c. condensation

3. b.   conservation and condensation

4. c. groundwater dips below the water table in an artesian well

5. d. oceans

6. c. geyser

7. d. groundwater

8. b. 70%

9. d. transpiration

10. c.   desalination