题目内容
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：C
提示：
提示：
|
在否定句中连接并列成分时只能用 or，而不用and；当how与不定式连用时，后面必须带有宾语. |
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