Present perfect vs. present perfect continuous

I (write) to the bank twice, but haven't had an answer

• have been writing

• have written

• has written

• has been writing

Sarah (paint) her room. She is almost finished.

• has painted

• have painted

• has been painting

• have been painting

We (have) a dog for ten years.

• have

• have had

• have been having

• had

I (work) hard lately.

• work

• have worked

• have been working

• has worked

How long (she/wait) for us?

I (study) all afternoon.

The children (be) on holiday for the last month.

We (miss) the bus twice this week.

I (finish) my homework. Now I’m going to watch TV.

How many biscuits (eat)?

• How many biscuits have you been eating?

• How many biscuits have you eaten?