问题描述：
19、 The paint is still wet___.
A、Don't he sure to touch it.
B、Not be sure to touch it.
C、Be not sure to touch it.
D、Be sure not to touch it.
A、Don't he sure to touch it.
B、Not be sure to touch it.
C、Be not sure to touch it.
D、Be sure not to touch it.
问题解答：
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