单项选择题

I really don't know ______.

A．to skate
B．how to skate
C．to skate how
D．how skate
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单项选择题
She talks and acts as if she ______ a monitor now.
A．would be
B．was
C．be
D．were
单项选择题
Swedish is the ______ language of most Swedes.
A．natural
B．native
C．home
D．mother
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