单项选择题

Li Ming knows a lot about Canada. He must ______ a lot of books about that country.

A．had read
B．have read
C．read
D．have readed
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单项选择题
The last man ______ the sinking ship was the captain.
A．left
B．to leave
C．having left
D．being left
单项选择题
He is ______ of the two.
A．stronger
B．the stronger
C．strongest
D．the strongest
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