Puf the verbs in brackets in the proper tense: 1. The patient (to be) under medical care before the surgeon began the operation.
2. They (to isolate) the patient with the grippe from the others before they were infected.
3. My experiments not yet (to prove) anything since I started them.
4. We (to complete) our observations on the changes in the blood erythrocytes by tomorrow.
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Manikaiva    1   11.12.2020 05:42    80