问题
完形填空
A survey of China's citizens found that some smokers are unwilling to kick the habit because they aren't fully aware ________ the harm it does to health.
答案
of
句意：一项针对中国公民的调查发现，一些烟民不愿戒烟是因为他们没有充分认识到吸烟对他们造成的伤害。be aware of...“知道，明白”。
