This is Linda’s hat, and those shoes are . A. her B. hers C. our D. their

The white cat is Helen’s, and the black cat is . A. my B. I C. mine D. of mine

We will use more ____ energy in the future. A. solar B. sunny C. sun D. sunlight

I __________ by car in another 20 years because it pollutes the air. A. will travel B. don’t travel C. travel D. won’t travel

My motorbike runs on electricity. How about _________? A. their B. them C. they D. theirs

Bullet trains will soon become a popular means of transport in Viet Nam __________ they are green and safe. A. because B. although C. because of D. in spite of

We are looking for types of vehicles that help us to avoid . A. traffic B. traffic jam C. rush hours D. walking

I think we have electric taxis very soon. A. may B. might C. will D. would

A sky safety system can help cars to traffic jams and crashes. A. prevent B. have C. use D. take

Every day over 1,000 new cars add to the city and the city of over 20 million people is getting more and more . A. expensive B. famous C. difficult D. gridlocked

Petrol-powered cars are not __________, so they won’t be popular. A. polluted B. harmful C. eco-friendly D. unlimited

A jet pack doesn’t _________ a lot of space. A. have B. bring C. take D. occur

Find the word which has the different stress. A. environment B. population C. convenient D. development