Teaching English through e-learning

Complete   the letter with the word in brackets in the correct form: past simple, present perfect or past perfect.

Dear Jenny,

Please help me. I have two children, Sarah who is five and is an angel and Lawrence who is a teenager and driving me crazy. For example, last week he  ¹________ (leave) the house and ²_______________ (not come) back three days. Before  last week he ³ _______________ (never do) this.

I ⁴______________ (try) everything the books tell you to do. Over the last few months, I ⁵__________ (be) understanding and polite  to him but every time I ⁶_______________ (speak) to him he⁷_________________ (get) angry and ⁸_____________ (start) to shout at me. Until last year he ⁹______________ (be) a good boy and ¹⁰___________________ (always help ) me at home. What can I do?