问题
选择题
23. I have two sisters, _____ working in this city.
A．both of them
B．both of whom
C．and both of them
D．both of them are
答案
答案：A
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23. I have two sisters, _____ working in this city.
A．both of them
B．both of whom
C．and both of them
D．both of them are
答案：A