I was told that there were about 50 foreign students __________ Chinese in the school, most __________ were from America.
| A．study; of whom |
| B．study; of them |
| C．studying; of them |
| D．studying; of whom |
Not only John and Tom but also their sister, Mary, ______great interest in the piano lessons.
| A．take | B．takes | C．have taken | D．had taken |
—Shall I wait here for three hours?
—Yes. Three hours ______for you to wait for such a doctor.
| A．are not very long | B．is not long enough |
| C．was not long enough | D．will be too long |
If nothing______, the oceans will turn into fish deserts.
| A．does | B．had been done | C．will do | D．is done |
The Philippines lies ______ the south of China, but Guangdong Province lies ______ the south of China.
| A．to; in | B．in; to | C．to; to | D．in; in |
In the dark forests______, some large enough to hold several English towns.
| A．lies many lakes | B．lie many lakes |
| C．do many lakes lie | D．does many lakes lie |