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题型：单选题题类：真题难易度：普通

—Does your school hold the raising of the national flag every Monday morning? —Yes, it rains heavily.

A、if B、since C、because D、unless

举一反三

—Do you want to have rice noodles for lunch?

—Rice,

She bought a digital camera online ____ she would save a lot of time.

—Have you decided ________or not you will go with us yet?

—Sorry, not yet.

—Is Tom at school today?

—No. He's at home _____ he is ill.

Talk to your teacher and you will get help ______ you have a problem.

The students didn't sing dance at the party yesterday.

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