1) He … to have done this experiment (известно). a) is known b) is supposed c) knows 2) The coefficient … to be put before the variable (несомненно). a) seems b) is sure c) sure 3) These rules … to be the same (говорят). a) are said b) is said c) says 4) He … to solve the problem (кажется). a) seems b) is seemed 5) The brackets … to be removed (маловероятно). a) are unlikely b) is unlikely c) unlikely

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