单项选择题


A．also
B．secondly
C．as well
D．at second
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单项选择题
A．At the other endB．On the contraryC．On the other handD．In addition
A．At the other end
B．On the contrary
C．On the other hand
D．In addition
单项选择题
A．have learntB．learnC．learntD．had learnt
A．have learnt
B．learn
C．learnt
D．had learnt
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