Are the sentences correct or incorrect?
1.When we arrived in Iceland, we hadn't known much about the country.
2.Roger was very busy. He was unpacking his luggage.
3.He left the house after it was stopping raining.
4.By the time the guests came, she had baked a tasty pie.

Nowadays, many people forget that such courtesy,especially the youth of today.I remember my grandmother who was very religious and polite.When I was (-) as a teenager I always stay (s) at my grandma's.So you come to her,and she gives you something good,yummy feed.Remember how I always asked (but) when we sat over a Cup of hot tea in the winter,when the window was raging snowstorm,sit and talk heart to heart with his grandmother.And we talked about it:
-You remember your young years...-he started the conversation the old lady.-at that time it was not so as now...and the other village people and others.In our times the youth has always been polite.
-Grandma!What is "politeness"?
-Well,-she sighed,-Politeness is a human characteristic which characterizes the personality good manners, good deeds and education.Under the politeness is usually described as the ability to communicate respectfully with people, a willingness to find a compromise and listen to opposing points of view.So that was my wonderful day at my grandmother's.

2. Children are not playing in the park. Are children playing in the park?
3. She are not readinga novel. Are she reading a novel?
4. They are not laughing loudly. Are they laughing loudly?
5. The baby is not playing with toys. Is the baby playing with toys.
6. Bob is not listening to music. Is Bob listening to music?
7. He is not helping the poor. Is he helping the poor?
8. She is not drinking coffee. Is she drinking coffee?
9. The old man is not walking slowly. Is the old man walking slowly?
10. Mrs. Brown is not baking a sponge cake. Is Mrs. Brown baking a sponge cake?