5. Выберите правильную форму глагола, учитывая сослагательное наклонение: 1. It is desirable that he (will be, be) witness

1. It is desirable that he be witness in this case. 2. They demanded that he submit the documents without delay. 3. Students must work hard lest they should fail at examinations. 4. You would improve your pronunciation if you read aloud every day. 5. I should have told her about it, if I had seen her last night. 6. I wish I had seen him yesterday.