Вставить слово в скобке в правильной форме
1. How long you (deal) with them?
2. When they (set up) a new company?
3. They (make) a lot of improvements in this model lately. 4. Last year our company (be) heavy with orders.
5. We (take part) in the conference the other day.
6. They (make) two deals this month.
7. We (carry out) an investigation since September.
8. We (do) successful research two months ago.
9. He (be) on trial for two months.
10.When you (take) him on trial?

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