Измените глагол в предложениях в зависимости от обстоятельств: his sister (develop) new alloys at the research laboratory 1. all the morning today; 2. five years ago; 3. every year; 4. for several hours next week; 5. before we came to help her yesterday.

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karp22rus2 karp22rus2  07.08.2020 12:10
1/ has been developing
2/ developed
3/ develops
4/ will have been developing
5/ had develped
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