Упростить 1) (cos L-1) (cos L+1) 2) cos (квадрат)L- sin(квадрат) L+1

Поставьте предложения в вопросительную и отрицательную форму.

1. The are to go the library once a week. 2. I shall have to go there by car. 3. The letter can be answered today. 4. The match was to take place to days ago. 5. I am allowed to go for a walk in the evening. 6. This exam must be taken in advance. 7. He is able to play football very well.

Замените would на 'used to', где возможно, и переведите.

1. The visitors would spend much time in different museums. 2. Metals would conduct electricity very well. 3. I would walk before sleeping. 4. He invited us to the party, but we wouldn't. 5. Students would repeat their experiments many times. 6. My father would repair his car once a year. 7. I would go there when l was younger.