Помогите с контрольной по английскому. Просто проверьте все ли правильно сделано. Заранее спасибо!

1 задание--------------------------------------------

1)of
2) at
3) of
4) with
5) by
6) to
7) of

2 задание------------------------------------------

to be scarce - иметься в недостаточном количестве

a scarcity of money - нехватка денег

scarcity of supplies - недостаточное снабжение

to contrive scarcities - намеренно создавать дефицитность

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Almost everyone is afraid of scarcity of money.

One way for a company to become more profitable is to produce and sell products that are scarce

In the nearest future Human may face a scarcity of supplies of natural resources such as wood, oil and etc.

Monopolies in USSR contrived scarcities in order to gain more market power.

3------------------------------------------------------------------

a) 2
b) 5
c) 6
d) 3
e) 4
f) 1

4 задание-------------------------------------------------------

They won't economize in order to reduce company's costs.

This monopoly is contriving scarcities now.

Our society has been using this resources since 17 century

What do you know about economics as a science?

5 задание----------------------------------------------------------------

a) 3
b) 1
c) 6
d) 2
e) 4
f) 5