21. In my opinion, nuclear power is not only expensive but also to our environment.
A. danger B. dangerous C. rick D. disaster
22. With teleportation, you disappear at a place, and then in another place seconds later.
A. appears B. appeared C. reappear D. reappears
23. 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
24. My brother and I often come to school foot.
A. at B. in C. by D. on
25. Skycycling tubes will be easy . A. drive B. to drive C. ride D. to ride
26. The white cat is Helen’s, and the black cat is .
A. my B. I C. mine D. of mine
27. Driverless cars have already , and they look so cool.
A. gone B. travelled C. exist D. existed
28. This is Linda’s hat, and those shoes are .
A. her B. hers C. our D. their
29. If I have a jet pack. I will use to fly anywhere easily.
A. my B. mine C. his D. their
30. A sky safety system can help cars to traffic jams and crashes.
A. prevent B. have C. use D. take
31. I think in the future cities will be more crowded and the traffic will get .
A. good B. well C. worse D. worst
Loga
Sinh Học lớp 12
