【C6】A．UponB．OverC．WithD．For

【C6】A．toB．forC．withD．on

【C6】A．come uponB．relate toC．interfere withD．set about

【C6】A．uponB．overC．intoD．after

【C6】A．fromB．inC．withD．for

【C13】A．uponB．overC．intoD．after

【C6】A．uponB．forC．asD．to