According to the latest report, human beings are _____ for the abnormal climate around the whole world.
| A．to be blamed | B．to be blaming | C．to blame | D．blaming |
Mary is absent from school today because he __ a cold.
| A．catches | B．had caught | C．has caught | D．will catch |
The meeting has begun, I wonder how long ago ___.
| A．it began | B．did it begin | C．began | D．it has begun |
You ___ me because I never said that I would meet you there.
A. must be misunderstanding B. must misunderstand C. have to misunderstand D must have misunderstood
This story was very exciting.I ___ it before.
| A．I had never read | B．I never did read | C．I would never read | D．I have never read |
I ___ Japanese since 1977.
| A．have been learning | B．learn | C．have learn | D．is learning |