单项选择题

I remember（）to help us if we ever got into trouble.

A．once offering
B．him once offering
C．him to offer
D．to offer him

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单项选择题

The temple is still in excellent condition（）that it was built 600 years ago.

A．Because
B．as
C．Considering
D．for

单项选择题

A man escaped from the prison last night. It was a long time（）the guards discovered what had happened.

A．before
B．until
C．since
D．when

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