21. В якому реченні дієслово-присудок вжито в пасивному стані? *
1)This material has developed cracks because we used it incorrectly
2)This material is usually cut in thin stripes before insulation
3)This material is insulating the engine
4)This material has been protecting the engine since 1985
22. В якому варіанті заперечне речення побудовано неправильно? *
1)This question isn’t usually discussed in public
2)This question is being not discussed at our conference
3)This question won’t ever discussed again
4)This question has not been discussed yet