Task 1. Chia các động từ sau ở thì quá khứ đơn.  1. He ............................ a teacher last weekend. (become)  2. We ............................ the books to the library. (return)  3. My friends and I ............................ letters to each other 2 years ago. (write)  4. Bobby ............................ chicken for his breakfast. (eat)  5. Last week, I ............................my family to Ha Long Bay. (drive)  6. My Dad ............................ a flower vase on my table. (put)  7. The baby ............................ when we took her toy away. (cry)  8. Many people ......................... to break the record. (try)  9. She ............................ the frog and it …………….. into a prince. (kiss - change) 10. We ............................ about our holiday in Da Lat. (talk)