Ответ:

I. u, c, c, u, u, u, u, u, c, u, u, u, u, u, u, u, u, c, u, u, u, c, u, u, u, u, c

II. 1. it is

2. it

3. doesn't know

4. is; are

5. is; doesn't

III. 1. are

2. are

3. was

4. is

5. tastes