1. The train arrived while Elie was having lunch. 2. Although the water is very cold in January, they go swimming anyway. 3. My father goes jogging every morning before he gets ready for work. 4. I learned a lot about wildlife after I visited Cue Phuong National Park yesterday. 5. You should wait here until your parents come back. 6. Before the party, there was a lot of food left. 7. My sister was sleeping while I was studying for the test last night. 8. As soon as I left home for school, it rained heavily. 9. I usually drink a glass of warm milk before I go to bed. 10. Who takes care of the baby when your mother is away? Exercise 7: 1. She (play) plays tennis every Sunday morning. 2. They (not eat) don't eat meat because they are vegetarians. 3. We (go) went to the beach last weekend and had a great time. 4. He (study) studies English every day to improve his language skills. 5. My parents (travel) traveled to Europe last summer and visited many countries. 6. She (work) works as a teacher at a local school in her hometown. 7. They (watch) watched a movie at the cinema last night and enjoyed it a lot. 8. We (not see) didn't see each other for a long time, so we decided to meet up for coffee. 9. He (read) reads books every night before going to bed. 10. The students (listen) listened carefully to the teacher's instructions during the class. Note: In exercise 7, you need to conjugate the verbs in brackets according to the subject and tense indicated in each sentence