选择题：仙人洞遗址最早发掘于（ ）选择一项：

The TV programmes are not suitable for children since they are dominated by viol

This is a ___ dictionary.选择一项：a.one lingualb.single lingualc.monolinguald.sololi

I shall go to the meeting tomorrow ___ I.m too busy.选择一项：A.whenB.unlessC.untilD.

I think this sofa is ___ than that one.选择一项：a.expensiverb.more costlyc.cost more

如果市场上所有顾客在同一时期偏好相同，对营销刺激的反应也相近，宜实行无差异性市场策略。（ ）选择一项：对错