Present perfect simple vs present perfect continuous

Abby __________ (read) that book for two hours.

Edith __________ (write) thirty emails over the course of the morning.

I __________ (work) on this project for less than half an hour, so I __________ (not prepare) all the papers yet.

William is so tired because he __________ (not sleep) for the last 28 hours.

• has not slept

• has not been sleeping

George __________ (eat) two bars of chocolate today.

The boy's school uniform is dirty because he __________ (play) in the mud.

I __________ (just arrive) at the train station.

• have just arrived

• have been just arriving

• have just been arriving

We are very exhausted because we __________ (do) sport all afternoon.

• have done

• have been doing

How long __________ (work) for this organisation?

• have you worked

• have you been working

• have you working

Jacob __________ (watch) this film eight times because it is his favourite film.

• has watched

• have been watching

• has been watching

• has watching