【C12】A．andB．isC．enjoysD．does

【C4】A．andB．butC．sinceD．while

【38】A．andB．forC．sinceD．but

【C5】A．andB．howeverC．soD．therefore

【C12】A．andB．norC．as wellD．either

A．andB．norC．or

【C12】A．andB．orC．thanD．as