问题
选择题
Usually I don't allow________in my office，but yesterday I allowed him________ here.
A．smoking；to smoke
B．smoking；smoking
C．to smoke；smoking
D．to smoke；to smoke
答案
答案：A
答案 A [考查allow的用法。allow后接doing或者sb to do sth结合句意及句子结构可知选A项。]