Put the verbs given in the Past indefinite or present perfect tenses : 1 yesterday they (to carry out ) their first experiment in the laboratory. 2 he not yet (to graduate ) from the institute . 3we ( to carry out ) many experiments lately . 4 Moscow (to become) one of the most beautiful cities in the world .
1. They carried out
2. He has not yet graduated
3. We have carried out
4. Has become
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