Объедините 2 предложения в одно:
1) He paid for the voucher (before) He heard about the bankruptcy of the travel agent.
2) We left for work ( before) He arrived.
3) (After) They got engaged. He went to the army.
4) She accepted his suggestion (before) She learnt the news.
5) They were in that country several times (by the time) They emigrated.

1. He had paid for the voucher befor he herad about the bankruptsy of the travel agent.2. We had left for work befor he arrived.3. After they had got engaged, he went to the army.4. She had accepted his suggestion before she learnt the news.5. They had been in that country several times be the the time they emigrated.