Поставьте глаголы в соответствующее время Simple либо Continuous1 We (to translate)

Поставьте глаголы в подходящее время Simple или Continuous
1 We (to translate) the arlicle during the whole lesson yesterday
2. We usually (to translate) texts using special dictionaries.
3. The students usually (to write) their fmal tests at the end of each term.
4. The students (to write) their final test. Keep siience.
5 When you (to come) in an hour we (to discuss) the results of the test.
6. I (to look) up the words in the dictionary while he (to read) the text.
7. The teacher (to explain) this grammar rule al the last lesson.
8. The teacher (to explain) the new grammar rule when I (to come) in.
9. During some decades of the last cermry scientists (to try) to explain this unuyual phenomenon.
10. A true scientigt always (to try) to explain unusual phenomena.
11 This plam (to produce) various kinds of instruments.