38. What’s a serious problem of Lake Baikal in Russia ?
A. The government didn’t have the power to enforce laws
*
and regulations.
B. It’s polluted by massive volumes of industrial wastes
discharged into it.
C. It has 1300 rare species that do not exist anywhere else
in the world.
D. It contains a rich variety of animals and plants.
Bạn đang xem 38. - ON TAP KIEM TRA HK2 ANH 12