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Fill in the necessary modal verbs can\ can`t , may\may not , must\mustn`t , to have to in the correct form 1) you swim well ? - oh ,no. swim very well .2) ben ,you polite with your sister ! 3) i come in ? -no, are late. 4)boys ,you in class. 5) helen hard , because she wants to pass her exam.

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1)can - can't 2)must или should 3)may. may not 4) must not 5) should

We are new generation. cars play an important role in our life. we practically need them. in the world also the level of transport maximum is a lot of people and with it problems appear: the huge number of vehicles became the reason of deterioration in an ecological situation in scales of all planet. therefore the majority of the countries fight against it and develop new means of transport - the sustainable transport

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