Опишите особенности строения каждой ткани.Укажите,какие функции они выполняют 

Look at the paired sentences below. Match each one with situation a) or b).
1 Inflation has fallen by 1 %.
2 Inflation fell by 1%.
a) Two years ago it was 4%. Last year it was 3%.
b) Last month it was 4%. This month it is 3%.
3 I think I’ve lost the file.
4 Sorry, I lost the file.
a) I can’t find the file. I wonder where I put it.
b) The file has gone and I’ll never find it.
5 Has Jane called this morning?
6 Did Jane call morning?
a) Jane promised to call this morning. It’s 11 am.
b) Jane promised to call this morning. It’s 2 pm.
7 Sales improved.
8 Sales have improved.
a) Last year sales were poor. This year they are better.
b) Sales were poor initially. A year later they were better.
9 How long have you worked here?
10 When did you start working here?
a) In 1999.
b) Since 1999.