单项选择题

The UN is spending 800 troops to （） the army patrolling the border are.

A.form
B.force
C.reform
D.reinforce

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单项选择题
It's difficult to believe that this little brown thing will eventually turn （） a beautiful butterfly.

A．out
B．around
C．to
D．into
单项选择题
New (technical) in the 1970s led to the (popular) digital watch and digital clock, (which) displayed the time and often the day, (date), and elapsed time.（）

A.technical
B.popular
C.which
D.date
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