问题
选择题
This is ______ clock and that is ______ eraser. [ ]
A. a; the
B. a; an
C. an; a
D. an; an
答案
答案：B
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This is ______ clock and that is ______ eraser. [ ]
A. a; the
B. a; an
C. an; a
D. an; an
答案：B