单项选择题

On the hill are maple trees（）leaves have turned red.

A．who
B．whom
C．whose
D．which

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单项选择题

Five minutes earlier,（）we wouldn't have missed the last bus.

A．or
B．and
C．but
D．so

单项选择题

My parents have lived here（）

A．since 1986
B．many years ago
C．for many years ago
D．since 1966 ago

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