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题型：单选题题类：常考题难易度：普通

They ________ carefully, but they didn't ________ anything.

A、listened; listen B、listened; hear C、heard; listen D、heard; hear

举一反三

—What does the sign on the wall mean?

—It tells us _______.

The cookies ______ good. Could I have some more?

I'm listening to music in my bedroom and my mother is ______ in the kitchen.

—How____ you ?

—I _____ fine, thanks.

—How can the ice melt?

—When the sun ________ on it, it melts.

— Does your father like ________ computer games at home?

— Not really.

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