Ответы:
I.
2. Does Mr. Simpson teach Chemistry?
Mr. Simpson doesn't teach Chemistry.
3. Do you like playing computer games?
I don't like playing computer games.
4. Do John and Sue work in a cafe?
John and Sue don't work in a cafe.
5. Do we do the shopping on Saturdays?
We don't do the shopping on Saturdays.
6. Does the baby cry all the time?
The baby doesn't cry all the time.
[ Do/does + I, you, we, they/He, she, it + V ?
I, you, we, they/He, she, it + do not (don't)/does not (doesn't) + V ]
II.
1) doesn't speak
2) doesn't
3) Does, doesn't
4) do
5) doesn't
6) do
[Do, don't/does, doesn't используются в отрицательных и вопросительных предложениях. Смотрите первое правило]
III.
1 - C;
2 - B;
3 - D
4 - E
5 - A
[Смотрите по словам и смыслу предложений]