问答题

It is essential to build up your confidence____________________ (如果你想在一生中有所成就的话).

【参考答案】

if you want to achieve something in life
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A．ifB．so thatC．becauseD．when
单项选择题
Less developed countries _______.
A．spend little on research
B．realize that progress depends on basic research
C．encourage their career scientists to experiment
D．devote less than 7% of their scientific budget to basic research
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