题型：单选题题类：真题难易度：普通

——Sam, come downstairs, please. I need your help.——Sorry, Mum. I _____ on the phone.

A、talked B、am talking C、was talking.

举一反三

Look! Your dog is {#blank#}1{#/blank#} a bird.

Lingling {#blank#}1{#/blank#} her trip to LA.

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