【华慧考博】考博英语每日一练(4.6)考博加油!
1. Ninety-nine percent of all forms of life that have existed on Earth are now ______
A. extensile
B. extensive
C. extinctive
D. extinct
2. The Canterbury Tales ______ written by Chaucer.
A. has been
B. were
C. was
D. had been
【考博英语英译汉】
The United Nations said that the world population is expected to reach 8.6 billion in 2030, and to hit 9.8 billion by 2050, despite nearly universal lower fertility rates.