【C7】A．groupedB．pressedC．crowdedD．provided

【C7】A．atB．toC．forD．over

【C7】A．ensureB．approveC．supplyD．deliver

【C7】A．adviceB．adviseC．advocateD．advance

【C7】A．concernsB．concernC．concerningD．concerned

【C6】______A．provide forB．provided forC．providing forD．provides for

Many computer languages provide a mechanism to call（）provided by libraries such as in .dl