21. –Frank failed the driving test again.
--______ He practiced a lot and was quite confident.
A. What if? B. How come? C. So what? D. Why not?
22. A scientific report has found that snow and ice on Africa’s highest mountain Kilimanjaro ______rapidly and could vanish within 20 years.
A. has been melted B. will melt
C. is melting D. was being melted