Task 2. Put the verbs in brackets into the correct tense: 1) She is a teacher. She ___ biology at school. She ___ a teacher for ten years. She ___ biology for ten years. (TEACH, BE, TEACH); 2) Albert Einstein ___ the Theory of Relativity. (DEVELOP); 3) Water ___ from the seas and oceans into the atmosphere. (EVAPORATE); 4) While Larry ___ his suitcase, Jane ___ sandwiches. (PACK, MAKE); 5) Yesterday Larry ___ his suitcase when the taxi ___. (PACK, ARRIVE); 6) Larry ___ his suitcase before the taxi ___. (PACK, ARRIVE); 7) The clothes ___ yesterday. (PACK); 8) The clothes ___ tomorrow. (PACK); 9) I’ll call him back later. I ___ my suitcases. I ___ them since breakfast. (PACK, PACK); 10) His grandmother wants him ___ his clothes. (PACK); 11) His grandmother makes him ___ his clothes. (PACK); 12) If he ___ his clothes on time, his grandmother will let him ___ to the park. (PACK, GO); 13) I wonder if he ___ his clothes on time. (PACK); 14) When we ___ at the station yesterday, the train ___ already ___. (ARRIVE, LEAVE); 15) I believe the train ___ soon. (ARRIVE)

1. She is a teacher. She teaches biology at school. She has been a teacher for ten years. She has taught biology for ten years.
2. Albert Einstein developed the Theory of Relativity.
3. Water evaporates from the seas and oceans into the atmosphere.
4. While Larry was packing his suitcase, Jane was making sandwiches.
5. Yesterday Larry was packing his suitcase when the taxi arrived.
6. Larry had packed his suitcase before the taxi arrived.
7. The clothes were packed yesterday.
8. The clothes will be packed tomorrow.
9. I’ll call him back later. I am packing my suitcases. I have been packing them since breakfast.
10. His grandmother wants him to pack his clothes.
11. His grandmother makes him pack his clothes.
12. If he packs his clothes on time, his grandmother will let him go to the park.
13. I wonder if he will pack his clothes on time.
14. When we arrived at the station yesterday, the train had already left.
15. I believe the train will arrive soon.

Времена выбираются по контексту: Present Simple для постоянных фактов, Past Simple для завершённых действий в прошлом, Continuous для процесса, Perfect для действия, завершившегося до другого момента, и Passive Voice для действия над предметом.