Downward Movement

The IT industry has never seen such a dramatic ...... before.
1. decrease
2. decraese
3. decriese
4. decraesee
Some of the world's most influential indices have ...... a sharp decrease this week.
1. suffered
2. suffared
3. sufered
4. surfed
The transportation company has seen a decrease ...... almost 3.2 per cent this quarter. It's been due to a harsh competition.
1. of
2. in
3. on
4. about
The sales department is warning that we have witnessed a sharp decrease ...... sales over the last two months.
1. in
2. on
3. about
4. at
The protests have not led to the expected decrease ...... corruption.
1. in
2. on
3. of
4. about
There's been a steady decrease ...... the birth rate all over Slovakia throughout the past seven years.
1. in
2. on
3. of
4. at
The latest index shows a decrease ...... the use of fossil fuels by almost 7 per cent on the same period a year ago.
1. in
2. about
3. at
4. on
All our branches have reported a decrease ...... hiring qualified staff lately.
1. in
2. on
3. about
4. at
The CFO has just briefed us on a dramatic decrease ...... the sales of new products.
1. in
2. on
3. at
4. of
We have witnessed a decrease ...... 3.5 per cent in the sales of tobacco products over the past seven months.
1. of
2. in
3. on
4. at