1) She speaks English well.

Does she speak English well? (общий вопрос)

She speaks English well or very badly? (альтернативный)

What language does she speak well? (специальный)

She speaks English well, doesn't she?  (разделительный)

4) Julia and her friends go to the cinema every week.

Do  Julia and her friends go to the cinema every week? (общий вопрос)

Do Julia and her friends go to the cinema every week or once a month? (альтернативный)

How often do Julia and her friends go to the cinema? (специальный)

Julia and her friends go to the cinema every week, don't they?    (разделительный)

5) Yesterday they went shopping.

Did they go shopping yesterday? (общий вопрос)

Did they go shopping yesterday or last week? (альтернативный)

When did they go shopping? (специальный)

Yesterday they went shopping, didn't they? (разделительный)

7) Julia's friends have finished studies.

Have  Julia's friends finished studies? (общий вопрос)

Have  Julia's friends finished or started studies? (альтернативный)

What have  Julia's friends finished? (специальный)

Julia's friends have finished studies, haven't they?  (разделительный)

8) They are looking for jobs now.

Are they looking for jobs now? (общий)

Are they looking for jobs or cars now? (альтернативный)

What are they are looking for now? (специальный)

They are looking for jobs now, aren't they? (разделительный)