He often watches TV _____ a while ____

试题详情及答案解析: He often watches TV _____ a while _____ dinner.
A.for; after B.after; for C.at; with; 答案：A; 试题分析：句意：他常常饭后看一会儿电视。for a while一会儿，after dinner饭后。故选A。
考点：考查介词的用法。