Поставьте глаголы в скобках в Present Perfectили Past Simple.1) These tasks
Поставьте глаголы в скобках в Present Perfectили Past Simple.1) These tasks (have) many difficulties. 2) production managers (analyse) these data yesterday? 3) A constructor (build) a house. 4) They (investigate) the problem a week ago. 5) Inflation (affect) on the economy a lot. 6) Early settlers (preserve) meat by drying and salting it. 7) They (just/elect) the president of the company. 8) The children (skate) on the frozen pond last winter. 9) The department (already/mail) out 200 notices. 10) When he (return) home they (not/be) ready. 11) The Olympic committee (announce) the results.12) We (be) here since ten o39;clock.
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1) These tasks have had many difficulties.
2) Did production managers analyse these data yesterday?
3) A constructor has built a house.
4) They investigated the problem a week ago.
5) Inflation has affected on the economy a lot.
6) Early settlers preserved meat by drying and salting it.
7) They have just elected the president of the company.
8) The children skated on the frozen pond last winter.
9) The department has already mailed out 200 notices.
10) When he returned home they were not ready.
11) The Olympic committee has announced the results.
12) We have been here since ten oclock.
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