ENGLISH 11 I LEARN UNIT 7

Most ______________ of this planet are spread by wind.

• seeds

• stones

• dust

• beads

The direct ______________ of foreign species to the environment include preying on native plants and animals as well as carrying disease.

• threats

• influences

• impacts

• causes

The railways made a direct physical impact ______________ the landscape.

• from

• on

• in

• for

The ______________ people in USA used to depend on forests for their livelihood.

• locally

• origin

• native

• history

Ecologists warn that the change will ______________ a negative effect on the animals and birds that get their food from oaks and hickories.

• give

• come

• have

• make

Chemicals can be used as ______________ to get rid of destructive pests, such as rodents.

• waste

• pollutants

• poisons

• sewage

More than one-third of the world's mangrove forests and around 20% of the world's coral reefs ______________ in the last few decades.

• have been destroyed

• have destroyed

• were destroyed

• destroyed

Many tourists visit hot ______________ to soak themselves in the mineral water.

• summers

• springs

• falls

• winters

Leaving an outside light on after dark can discourage a potential burglar. (CLOSEST in meaning)

• ban

• deter

• attract

• prohibit

Zebra mussels harm the ecosystem in many ways, such as filtering out algae that many species need for food. (CLOSEST in meaning)

• decrease

• pollute

• damage

• prevent