问题:
—Where are the pens?
—Sorry, I____.
[ ]
A. not know
B. know not
C. don"t know
D. not to know
—Where are the pens?
—Sorry, I____.
B. know not
C. don"t know
D. not to know
—Sorry, I____.
[ ]
A. not know B. know not
C. don"t know
D. not to know
参考答案: