a.Join the following sentences by using time conjunctions when, while,or as.Make changes if necessary.(Page 55) 1.My mother burnt her fingers while/when/as she was lifting the kettle off the stove. 2.When the dog saw the burglar,it barked and barked until its master woke up. 3.The pupils pretended to be hard at work when/as they saw their teacher coming down the corridor. 4.When all the guests had left,Mr.and Mrs.Wilson started to clean up the house. While/When Mr.and Mrs.Smith were out to attend an 5. evening party,Mr.Smith's sister looked after their children. Mary was cooking the lunch while we were playing chess. 6.While Mary was cooking the lunch,we were playing chess. 7.The divers quickly swam to their boat when/as they saw some sharks approaching them menacingly. Unit 3,Book 4 a. Join the following sentences by using time conjunctions when, while, or as. Make changes if necessary. (Page 55) 1. My mother burnt her fingers. She was lifting the kettle off the stove. 2. The dog saw the burglar. It barked and barked until its master woke up. 3. The pupils pretended to be hard at work. They saw their teacher coming down the corridor. 4. All the guests had left. Mr. and Mrs. Wilson started to clean up the house. 5. Mr. and Mrs. Smith were out to attend an evening party. Mr. Smith’s sister looked after their children. 6. Mary was cooking lunch. We were playing chess. 7. The divers quickly swam to their boat. They saw some sharks approaching them menacingly. My mother burnt her fingers while/when/as she was lifting the kettle off the stove. When the dog saw the burglar, it barked and barked until its master woke up. The pupils pretended to be hard at work when/as they saw their teacher coming down the corridor. While/When Mr. and Mrs. Smith were out to attend an evening party, Mr. Smith's sister looked after their children. When all the guests had left, Mr. and Mrs. Wilson started to clean up the house. Mary was cooking the lunch while we were playing chess. While Mary was cooking the lunch, we were playing chess. The divers quickly swam to their boat when/as they saw some sharks approaching them menacingly. Unit 3, Book 4