Transform the following before-clauses into after-clauses and vice versa, changing the tense of the verbs accordingly. Example: Mother had returned before I went for a walk.

Mother returned after I had gone for a walk.

1. The rain began after we had come from the Institute. 2. She had fallen asleep before her family returned from the pictures. 3. She had cooked the cake before the guests came. 4. Father rang up after I had finished my lessons. 5. I came home after it had grown dark. 6. They had gone to the skating-rink before the snow stopped. 7. She poured out tea after her husband had taken the cake from the oven. 8. The storm had stopped before they left the village. 9. They had left the town before the war began. 10. I visited them after they had got their new flat. 11. He went to bed after he had done everything. 12. She had washed up before the children came from the pictures

1. Thank you for calling me. This is really good news. 
2. Have you done all the laboratory work? I am going to check it tomorrow.
3. He is only thirty but his hair is silver.
4. There are many good tips for 1st year students.
5. Parents like giving tips to their children and these tips are usually useful but unfortunately not all children follow them.
6. Your money has been found. It was in a book. I found it looking through the book.
7. I bought this watch in the store on Kalinina Boulevard. It is very nice and it is never fast or slow.
8. He has two watches. One is digital and another one is regular.
9. Fruit is good for health. We eat a lot of fruits in summer. This summer fruits are very cheap.
10. -What is the plot of the book for home reading?
-It has a lot of interesting texts and useful information.
11. -Where are my glasses? -Here they are. You are always losing them!
12. She had blond hair in her childhood but then it got darker.
13. A young teacher always followed his older colleagues' advice.

1. Thank you for calling me. That is really good news.
2. Have you done all the laboratory work? I'm going to check it tomorrow.
3. He is only 30 year old, but he already has grey hair.
4. There are a lot of good tips for freshmen in this article.
5. Parents love to give their children some advice and their tips are usually good; however, unfortunately, not all children follow them.
6. Your money has been found. It was in the book. I found it when I was looking through it. 
7. I bought this watch on the Kalinin avenue. It is really good. It never gains or loses.
8. He's got two watches. One of them is digital and the other one is ordinary.
9. Fruits are very good for your health. We eat lots of fruits in summer. They are really cheap this summer. (если учитель вдруг начнет настаивать на то, что фрукты - единственное число, скажи, что можно употреблять и во множественном. так сказали мне английские сайты :D)
10. - What's the plot of the home reading book?
      - It contains many interesting texts and useful data / information.
11. Where are my glasses? Here they are. You always lose them.
12. She had fair hair as a child, but then it got darker.
13. A young teacher always followed the advice of his older colleagues / associates / friends.