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题型：单选题题类：常考题难易度：普通

I'm going to ask Sam _________ the flat.

A、clean B、cleans C、cleaning D、to clean

举一反三

At present, lots of people would rather _________ in the country because there is ________ pollution in the city.

He was very happy {#blank#}1{#/blank#} (see) his mother.

—Joe, how was your trip to Sanya?

—Great. I decided there again next year.

I go to my grandparents' home with their housework every Sunday.

I remember ____ him ____ the bike needed ____.

Fan Jinshi has done a lot (protect) Dunhuang culture these years.

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