问题
选择题
Having been ___ volunteer in a day-care centre for weeks, Susan feels much sympathy for ___ disabled.
A．a; /
B．/; a
C．the; the
D．a; the
答案
答案：D
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Having been ___ volunteer in a day-care centre for weeks, Susan feels much sympathy for ___ disabled.
A．a; /
B．/; a
C．the; the
D．a; the
答案：D