Предмет: Химия, автор: AlisaKrest

сульфид магния это: а)оксид, б)основание, в)соль, г)кислота

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Автор ответа: skorpion2013

0

вариант в) соль

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10. Choose the correct tense to fill in the blanks.

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2) They __ a very large old country house a few miles from Cambridge.

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5) Then, to our surprise we ___ someone walking around in the room above.

a) have heard b) had heard c) heard d) kad been hearing

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a) has forgotten b) had forgotten c) forgot d) was forgetting

7) So we took no notice and___ talking.

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