问题
选择题
The germs can get ____ the human body ____ the mouth. [ ]
A. on; across
B. into; across
C. on; through
D. into; through
答案
答案：D
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The germs can get ____ the human body ____ the mouth. [ ]
A. on; across
B. into; across
C. on; through
D. into; through
答案：D