grade 8- unit 7- lesson 4

Noise is ______________( liên tục) and loud sound

• permanent

• constant

• relaxed

• peaceful

When a sound is louder than 70 decibels, it can cause________________( ô nhiễm tiếng ồn)

• noise pollution.

• light pollution

• radioactive pollution

• sound pollution

the noise from a vacuum cleaner or a motorcycle can ___________________( dẫn đến ) permanent hearing loss after eight hours

• reduce

• result in

• relaxed

the noise from a vacuum cleaner or a motorcycle can result in permanent ________________ after eight hours

• reduce

• hearing loss

• relaxed

Noise pollution can also_________________ headaches and high blood pressure.

• reduce

• lead to

• relax

• release

Noise pollution can also lead to headaches and_________________ pressure.

• reduce

• high blood

• relax

• hearing

Wearing __________________( tai nghe, nút bịt tai) when you go to concerts at safe levels can help you reduce the effects of noise pollution.

• earplugs

• headphones

• head set

Wearing headphones at safe levels can help you reduce the ______________( ảnh hưởng ) of noise pollution.

• release

• effects

• permanent

• loss

You should wear earplug when you go the _____________( hòa nhạc ) or other loud events

• earplug

• concert

• presssure

• music

If the world temperatures _______________(continue) to rise, there will be less now.