问题
________ , the polluted air canresult in deadly diseases or even death.
A:being breathed in
B:having been breathed in
C:breathed in
D:breathing in
B:having been breathed in
C:breathed in
D:breathing in
正确答案是：
同类题型
Yourlaziness__________yourfailure,whilehishardwork__________hissuccess. [ ]
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Sally took a photo of her friends while they computer games.
They are _____ to eat Chinese food though they have been in America for years. [ ]
Do you often study with a group— Yes. I find ______ really helpful to study that way.