问题
选择题
单项选择。
"Hello, who's ___?" "Hello, ___ is Mary speaking." [ ]
A. this; that
B. that; this
C. this; this
D. that; that
答案
答案：B
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单项选择。
"Hello, who's ___?" "Hello, ___ is Mary speaking." [ ]
A. this; that
B. that; this
C. this; this
D. that; that
答案：B
