【C8】A．laterB．afterC．agoD．before

【C15】A．whileB．afterC．beforeD．over

【C15】A．AsB．AfterC．WhileD．Before

A．laterB．beforehandC．afterwardsD．before

A．laterB．afterC．moreD．ago

【C15】A．AtB．AfterC．Not untilD．Before

【C20】A．laterB．firstC．nowD．before