Exercise VII. Choose the necessary form the verb in brackets:
1. By the end of the fortnight we ...all our money (spent, shall have spent, will spend).
2. The first snow ...by that time (have gone, went, will have gone).
3. They ...at the laboratory from 9 till 12 (shall work, will work, will be working).
4. They ...at the laboratory at 10 o'clock in the morning (have worked, will worked, will work).
5. We ...our experiments next week (shall have begun, begin, shall begin).
6. I … another job by that time (shall have find, have found, shall have found).
7. The leaves of the electroscope ...before the charged rod touches the electroscope (diverged, has diverged, will have diverged).
8. We ...the properties of this material before we began to use it (studies, study, had studies).
9. The teacher ...this rule during the first part of the lesson tomorrow (will explain, will have explained, will be explaining).
10. He ...the problem of man and his interaction with the environment by two o'clock in the afternoon (discussed, will have discussed, discussing).

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