Помогите пожалуйста, нужно отыскать какие предложения построены не верно: Find the

Помогите пожалуйста, необходимо отыскать какие предложения построены не правильно:
Find the sentences that contain a mistake
1. I got a letter from my Italian friends in last Saturday
2.Tom said his secretary had already sent all the letters
3.Theres still a few snow on the roofs of the houses
4.We wish they went to the football match last Sunday
5.I dont like this place. I wish I lived in somewhere more interesting
6.If you wait for a minute, Ill wrap the parcel for you
7.If I hadnt been held up in the traffic jam, I would have arrived on time