Present Perfect vs Present Perfect Continuous

Someone _____ all the cakes. I'll have to buy some more.

• has eaten

• has been eating

What _____ your sister for her birthday?

• have you bought

• have you been buying

My throat is really sore. I _____ all evening.

• have sung

• have been singing

Brenda _____ Russian, but she finds it difficult.

• has learned

• has been learning

How many people _____ to your party?

• have you invited

• have you been inviting

Those two cats _____ on that branch for the last hour.

• have sat

• have been sitting

It _____ all day! Why can't it stop?

• has rained

• has been raining

Diana _____ twelve different dresses in the past week!

• has worn

• has been wearing

I _____ everything you asked. What should I do now?

• have done

• have been doing

Graham and Pauline _____ to find a house for ages, but they can't find one they can afford.

• have tried

• have been trying