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выбрать правильный вариант 8. The liquid solutions will be dealt in this article.
a. on
b. upon
c. with
d. by
9. Oxygen ___ by heating mercuric oxide.
a. was obtained
b. are obtained
c. have been obtained
d. has been obtained
10. The Periodic Law widely ___ by chemists.
a. will be applied
b. will have been applied
c. is applied
d. has been applied

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FreeSasha
FreeSasha
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1  unhappy,fitness,  scientific,dangerous, harmful, decision,unhappy      2didn't remember,was,understood,  was closed, first, has happened,had taken, cannot(can't),your

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