2019-2020学年北师大版高中英语精华课件必修2：名词性从句1-302edu教育资源网

4. _____ you don’t know the rule won’t be a sufficient excuse for your failure. A. It is B. That C. Because D. What

3. It is true ______ the earth is round. A. that B. what C. which D. how

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