【C13】A．atB．toC．withD．about

【C7】A．atB．toC．forD．over

【C18】A．atB．toC．inD．of

A．atB．toC．byD．with

【C4】A．AtB．ForC．WithD．After

【C4】A．atB．forC．withD．from

A．forB．toC．withD．by