题目内容
() 3. — Do you know World Earth Day?
—Sure. It in 1970 to tell us to protect our planet.
A. sets up B. set up C. is set up D. was set up
3.D
3.D
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题目内容
() 3. — Do you know World Earth Day?
—Sure. It in 1970 to tell us to protect our planet.
A. sets up B. set up C. is set up D. was set up
3.D