【C7】A．improvedB．sharedC．addedD．proved

A．stopped B．sharedC．won D．exchanged

A．commonB．sharedC．specialD．specific

【C19】A．stoppedB．sharedC．wonD．exchanged

【C20】A．improvedB．developedC．worsenedD．impaired

【C8】A．saysB．tellsC．showsD．proves

【C17】A．quarrelB．explainC．argueD．prove