问题
选择题
I don't know_____.[ ]
A. how to say or do
B. what to say and to do
C. what to say or do
D. how to say and to do
答案
答案：B
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I don't know_____.[ ]
A. how to say or do
B. what to say and to do
C. what to say or do
D. how to say and to do
答案：B