问题补充:
.- Can I smoke here?
- Sorry. We don’t allow here.
A. people smoking
B. people smoke
C. to smoke
D. smoking
答案:
A. people smoking
B. people smoke
C. to smoke
(答案→)D. smoking
解析:短语:允许做某事allow doing sth,允许某人做某事allow sb to do sth,句意:我能在这吸烟吗?对不起,我们这不允许吸烟。所以选D。