---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 |
Don’tany excuse for your failing in the exam this time. We won’t believe you.
| A．put up | B．Show up | C．make up | D．bring up |
two exams to worry about, I have to work really hard this weekend.
| A．With | B．Besides | C．As for | D．Because of |
We shouldn’t take for granted that we still have a lot of time before the Entrance Examination.
| A． this | B．that | C．it | D．such |
Ladies and gentlemen, please fasten your seat belts. The plane.
| A．takes off | B．is taking off | C．has taken off | D．took off |
It snowed for days on end. We thought it would never come to end!
| A．an;an | B．an;/ | C．/;an | D．/;/ |