5. Перепишите предложения, выбрав правильный вариант придаточного предложения.

1. He thought that this disease … a) is not dangerous b) was not dangerous с) will not be dangerous.

2. The surgeon said that the operation … a) was necessary b) is necessary c) had necessary.

3. The teacher told us that we … a) must work harder b) would work harder c) have to work harder.

4. I knew that he … a) is a famous scientist b) will be a famous scientist c) was a famous scientist.

5. The patient stated that he … a) had pneumonia two years before b) had had pneumonia two years before c) he has pneumonia.