This discovery ... in 1928 by Alexander Fleming.

• made

• was made

• makes

• has made

At the moment the problem ... by our politicians.

• discusses

• is being discussed

• had discussed

• will have been discussed

The car was repaired ... a good specialist.

• in

• by

• of

• out

The window was broken ... a stone.

• of

• by

• with

• in

The portrait was drawn ... watercolour.

• in

• by

• with

• of

Ему одолжили денег на машину.

• He was lent to some money for a car.

• He has been lent some money for a car.

• A car was lent some money for him.

• Some money has been lent to a car for him.

Студентам объявили их оценки за экзамен.

• The students were announced their examination marks.

• The students have been announced their examination marks.

• The students have been announced to their examination marks.

• Examination marks were announced to the students.

Правило было объяснено студентам преподавателем.

• The students have been explained the rule by the professor.

• The students have explained the rule to the professor.

• The rule has been explained to the students by the professor.

• The rule has been explained to the professor by the students.

Бедные - это значительная часть избирателей.

• The poor are a considerable part of voters.

• Poor are a considerable part of voters.

• A poor are a considerable part of voters.

• Poor are a considerable part of the voters.

В прошлом письма доставлялись по морю.

• In the past, letters were delivered by sea.

• In past, letters were delivered by the sea.

• In past, the letters were delivered by sea.

• In the past, the letters were delivered by the sea.