1 . The ________ of the world is growing larger and larger. As a result, the burden of the earth is becoming heavier and heavier.

A．population

B．pollution

C．protection

2 . What are your rules on tiger _______________ (protect)?

3 . The young in our society need care and ________ (protect).

4 . We should make some rules on whale_____(protect).

5 . Shoes are a ________(保护) for the feet.

6 . They need our _________.（保护）

7 . The government offers complete __________against fire and theft. (protect)

8 . People used to think that wearing masks was only necessary for special groups of people such as medical workers, but now they are coming to realize that it can provide ________ from virus and sickness.

A．preparation

B．presentation

C．pollution

D．protection

9 . They made some rules about the_____________ (protect) of the wild animals.

10 . Wild animals which are now in danger need our ___________ (protect).