Напишите,пожалуйста, качественные реакции на минеральные кислоты?

Как избежать нападений в электричке?

The following sentences have too many conjunctions.Rewrite each sentence correctiy,twice.Use only one conjunction each time.

a)Besause Martin worked hard so he did well in all his exams.

EXAMPLE: As you know,that l want to go to the US next summer.

                   As you know, l want to go to the US next summer. 

                   You know that l want to go to the US next summer. 

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b)Alyhough Eqypt is a long way from the UK,but it is a very popular holiday destination.

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c)As you will understand l`m sure that l can`t lend you any money.

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а)6 cos^2 x+cosx-2

  ------------------------------------ =0

  (3cosx+2)*корень из -tgx

б)x принадлежит промежутку [пи; 3пи/2]