问题
选择题
As is well known, everyone is forbidden ________ in buses, regardless of what they are.[ ]
A．to smoke
B．smoking
C．to be smoking
D．to smoking
答案
答案：A
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As is well known, everyone is forbidden ________ in buses, regardless of what they are.[ ]
A．to smoke
B．smoking
C．to be smoking
D．to smoking
答案：A