单项选择题

50()

A.patient 
B.anxious 
C.urgent 
D.nervous

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单项选择题
49()

A.back 
B.aside 
C.about 
D.off
单项选择题
The idea (that) learning is (a) lifelong process (has expressed) by philosophers and educationalists (throughout) the centuries.()

A. that
B. a
C. has expressed
D. throughout
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