单项选择题

Nothing but grass and trees ______ the hill.

A．covers
B．cover
C．covering
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单项选择题
—______ house is that —It's mine.
A．Who
B．Whom
C．Whose
单项选择题
Lily was very angry ______ Tom for not asking her to the party.
A．with
B．to
C．about
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