1.---In recent years, _____ problem of global warming has been very serious.
---That's right. People are facing ____ number of natural disasters now.
A. the; a
B. a; the
C. a; a
D. the; the
2. Recently our class held a fierce ________ as to whether to raise the price of school meals or not.
A. bargain
B. debate
C. quarrel
D. contest
