The earthquake ______ when I _______some cleaning.

题型：单选题题类：常考题难易度：普通

A、starts, was doing B、started, was doing C、was starting, was doing D、starts, were doing

举一反三

— Sorry, I a nap at that time.

—I was in the library. I{#blank#}1{#/blank#}(search) for some information on the Internet.

—Sorry I ____ an interesting book called Three Body Problemat that time yesterday.

— Sorry, I didn't hear it. I ____ in the kitchen.

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