Sam enjoys ___ stamps.
| A．to collect |
| B．collected |
| C．collects |
| D．collecting |
The young man lay on the sofa with his arms _____ and soon fell asleep.
| A．folded | B．folding | C．being folded | D．to fold |
“Well done, John.！ Not a single mistake _____ in your exam paper this time！”said the teacher.
| A．you made | B．did you make | C．had you made | D．you have made |
-----Kathy and her sister are so alike.
------Yeah, I can’t tell one from ______.
| A．another | B．other | C．the other | D．others |
In my view, biology is ______ chemistry, but a little easier than mathematics.
| A．a subject so difficult as | B．as difficult a subject as |
| C．as a difficult subject as | D．difficult as a subject as |
----Would you mind giving your advice on how to improve our business management?
----If you make ____ most of the equipment, there will be _____ rise in production.
| A．/; / | B．the ; a | C．/;a | D．the;/ |