There __________ a big tree in front of my house . I could hear many birds sing in it .

题型：单选题题类：常考题难易度：普通

重庆市江津区三校2016届九年级上册英语期中测试试卷

A、used to be B、is used to be C、used to have D、was used to be

举一反三

— OK, I'll ________ them _________ right now.

—Yes. They can harmful gases from the air.

—Sure, I'm glad to do that.

—I am sorry，Mom.I won't do that again.

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