A. suddenly

Đáp án chính xác

1. Where do traffic problems and pollution frequently happen?

a. small towns

b. rural areas

c. big cities

d. remote villages

No one is better cook than his mother, ______?

A. is she

B. isn't she

C. are they

D. aren’t they

Which way of learning do you think is better? Why?

About twenty percent of the world’s present energy already (1)..... from the sun in one form or another.

A.goes                 

B.comes              

C.makes             

D.supplies

This is the best novel I have ever read. (before)

New York City is expected to increase its ________ energy capacity by 50% by 2050. (RENEW)

The energy saving light bulbs consume about of electricity amount in comparison with standard ones.

A. 25%                                  

B. 35%                              

C. 15%                            

D. 45%