1.用所给词适当形式填空。
The car rushed at the bridge at astonishing speed. (astonish)
The postal _______here is very unreliable. (serve)
He was an headmaster before _______. (retire)
The exam was relatively easy. (relative)
The car rushed at the bridge at astonishing speed. (astonish)
The postal _______here is very unreliable. (serve)
He was an headmaster before _______. (retire)
The exam was relatively easy. (relative)

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