Present Perfect vs. Present Perfect Continuous

She has _______ six letters this morning.

• written

• been writing

I've _______ this watch since I was at school. 

• had

• been having

We've _______ a great time. Why don't you join us?

• had

• been having

I've _______ to call her all morning.

• tried

• been trying

I've _______ her five times this morning.

• called

• been calling

How long have you _______ , Mr. Smith?

• waited

• been waiting

I've _______ him that all day.

• told

• been telling

If I've _______ once, I've _______ you a thousand times - do not climb on that wall!

• told

• been telling

What has she _______ to her hair? It looks awful.

• done

• been doing

I've _______ enough, thanks.

• had

• been having