单项选择题

If you don't look ______ , you'll get that heavy box on your head.

A．out
B．on
C．into
D．over
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单项选择题
All transactions are strictly ______ , and we never sell, rent or trade any customer's name.
A．confident
B．consecutive
C．confidential
D．consequential
单项选择题
With the fall in the number of students studying science, we will have lost many with the potential for intellectual ______.
A．creativity
B．credentials
C．recreation
D．credibility
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