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题型：单选题题类：常考题难易度：容易

This is ____pen. It's _____ English pen. （）

A、a…an B、a…a C、an…an D、an…a

举一反三

Edward and William are brothers. There is uncommon similarity between two boys.

The UK is _________ European country with a long history.

We have __________ English class __________ Friday morning.

— Do you think French is unimportant subject?

—Of course not. It's quite useful skill.

______ new study says that going to _______ bed late is harmful to our health.

—Jack, you missed __________"U" in __________word "usually".

—Sorry, Sir.

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