单项选择题


A．At the other end
B．On the contrary
C．On the other hand
D．In addition
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单项选择题
A．have learntB．learnC．learntD．had learnt
A．have learnt
B．learn
C．learnt
D．had learnt
单项选择题
A．in this caseB．in any caseC．in no caseD．in some cases
A．in this case
B．in any case
C．in no case
D．in some cases
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