单项选择题

So little（）about mathematics that the lecture was completely beyond me.

A．I know
B．I knew
C．do I know
D．did I know

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单项选择题
The captain is the only one of the players（）the team practice regularly.

A．have attended.
B．who have attended
C．who has attended
D．who attended
单项选择题
Mr. Smith will never forget the days（）he spent with his family in those cities of Italy.

A．when
B．which
C．during
D．on which
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