Only in recent years ______ to realize the importance of wildlife conservation.
| A．do people begin | B．have people begun |
| C．people have begun | D．people begin |
Lucidly he is going to attend Qinghua University, __________ his sister graduated last year.
| A．that | B．where | C．which | D．there |
—What do you think of the standard of the new curriculum (课程)?
—It is certain to have a great __________ upon the future of both teachers and students.
| A．result | B．effect | C．effort | D．affect |
Old people need special care in winter, as they are very __________ to sudden change of the weather.
| A．sensitive | B．painful | C．attractive | D．familiar |
Now more and more people have come to know the role that trees __________ in our natural environment.
| A．do | B．take | C．play | D．work |
My favorite cartoon character is Mickey Mouse. It's so __________ that we often feel __________.
| A．exciting; exciting | B．excited; exciting |
| C．exciting; excited | D．excited; excited |