题目内容
16.Betty is often seento help(help) the old man with his housework.分析 贝蒂经常被看见帮助老人做家务.
解答 答案:to help
联系语境,根据关键部分Betty is often seen 可知此句运用了一般现在时的被动语态,指被看到;结合see的用法在被动语态中原来省略的to应该还原回来,即为sb be seen to do sth;结合提示词help为动词"帮助",所以此处应该用to help.故填:to help
点评 此题考查固定表达.做题时联系被动语态结合see的固定用法得出正确的答案.
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