问题补充：
Keeping a foreign pet is dangerous, as the owner might be infected the diseases brought along with the animal.
A. in
B. with
C. by
D. for
答案：
A. in
(答案→)B. with
C. by
D. for
解析：考查词组“sb. be infected with + 疾病”，表示“某人被传染上某种结构”，主动式为infect sb. with 疾病，表示传染某人某种疾病。
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