Mr. Blake ____ Shanghai in a few days. Do you know when the earliest plane ____ on Sunday?
| A．is leaving, takes off | B．leaves, takes off |
| C．is leaving, is taking off | D．leaves, is taking off |
The number of foreign students attending Chinese universities ________ rising steadily since1990.
| A．is | B．are | C．has been | D．have been |
-Why does the Lake smell terrible?
-Because large quantities of water .
| A．have polluted | B．is being polluted | C．has been polluted | D．have been polluted |
Daniel's family their holiday in Huangshan this time next week.
| A．are enjoying | B．are to enjoy |
| C．will enjoy | D．will be enjoying |
With the help of high technology, more and more new substances ______ in the past years.
| A．discovered | B．have discovered |
| C．had been discovered | D．have been discovered |
I got caught in the rain and my suit _______.
| A．has ruined | B．had ruined |
| C．has been ruined | D．had been ruined |