4. In areas with high concentrations of tourist activities and attractive natural attractions, waste ___ is a serious problem. ( dispose)

5. Unlike pesticides, ___ are not directly toxic but their presence in freshwater changes the nutrient system. (fertilize)

6. ____ caused by deforestation can also lead to increased flooding.( erode)

1. African and Asian elephant numbers fell dramatically in the 19th and 20th centuries, ___ due to the ivory trade and habitat loss. (large)

2. The environmental consequences of large dams are numerous, including direct impacts to the biological, chemical and ___ properties of rivers. (physics)

1. Dinosaurs have been ___ for millions of years.

a. endangered

b. extinct

c. threatened

d. disappeared

2. As town grow, they tend to destroy the surrounding___ areas.

a.urban

b. commercial

c. land

d. rural

3. During the last hundred years, we have done great ___ to the environment.

a. injury

b. pollution

c. damage

d. hurt

1. If you ask me, ___ waste is a much bigger problem than ordinary household waste.

a. industrial

b. business

c. working

d. manufacturing

2. Do you know what CFC ___?

a. sets in

d. does up

c. stands for

d. gets down

3. There's been a ___ in Germany and a village was completely destroyed.

a. flood

b. drizzle

c. shower

d. smog

1. Do you know ___ makes people fat?

a.who

b. that

c. what

d. how

2. he showed us the house ___ he was born.

a.which

b. in which

c. in where

d. in that

1. The police accused the man ___ murder.

a. of

b. in

c. about

d. on

2. She detests ___ all day with strangers.

a. chatting

b. to chat

c. to chatting

d. chat

3. The biologist doesn't allow us ___ in the laboratory.

a. smoke

b. to smoke

c. smoking

d. smoked

1. Take your overcoat with you ___ it gets cold.

a. although

b. in case

c. unless

d. until

2. We had to ___ the match because of the bad weather.

a. call back

b. think over

c. call off

d. get out

3. She looked very pleased ___ the gifts.

a.at

b. on

c. with

d. of

4. We congratulated him ___ getting married.

a. with

b. of

c. at

d. on

5. This picture reminds me ___ my childhood.

a. at

b. about

c. to

d. of

1. Who's going to help me___ the ballons for the party?

a. blow down

b. blow up

c. get down

d. get up

2. Charles has been out of ___ for over a year now.

a. work

b. job

c. employ

d. employed

3. I___ have toast but I wasn't very hungry this morning.

a. nearly

b. normally

c. quite

d. well