【C8】A．preventB．requireC．assistD．forbid

A．supportB．aidC．assistD．help

A．showB．requireC．collectD．discover

【C13】A．preventB．avoidC．denyD．refute

【C8】A．preventB．predictC．pretendD．prevail

【C4】A．spendB．requireC．settleD．retain

【C11】A．serviceB．serveC．assistD．support