— What's wrong with your lessons these days?— I have tried my best, but I don't understand ______ I still get so low marks.

题型：单选题题类：常考题难易度：普通

牛津译林版九年级英语上Unit 3Teenage problems 单元测试

— What's wrong with your lessons these days?

— I have tried my best, but I don't understand ______ I still get so low marks.

A、that B、whether C、why D、how

举一反三

- It is more convenient to communicate with our parents.

—I'm not sure yet.

—Sorry, I don't know her address, either.

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