opinion
n.意见，看法，主张
It’s a terrible shame, in my opinion , that the building was knocked down.在我看来，把这幢建筑拆了真是太可惜。
opponent
n.敌手，对手;反对者
Graf’s opponent in today’s final will be Sukova.格拉芙今天的决赛对手将是苏科娃。
opportunity
n.机会，时机
This is an ideal opportunity to save money on a holiday to Crete.这是能省钱去克里特岛度假的理想机会。
oppose
vt.反对，反抗
Congress is continuing to oppose the President’s healthcare budget.国会继续反对总统的医疗保健预算。
opposite
prep./ ad.在对面 a.对面的 n.对立面
The people sitting opposite us looked very familiar.坐在我们对面的那些人看上去很面熟。
