The house was a when we bought it. A: wreck B: wrecks C: wrecked D: wrecking

The dean is so bossy that he often______ down other teachers opposition. A: freezes B: frowns C: whips D: wrecks

Preferred channel marks are aids to navigation which all following marks other than（）． A: channel junctions B: bifurcations C: fishing traps D: wrecks or obstructio