If__________ (observe) the golden rule: reduce, reuse and recycle, we can make a-组卷网

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If __________ (observe) the golden rule: reduce, reuse and recycle, we can make a better world for our next generations.

A．observed	B．observing
C．having observed	D．not observing

21-22高一下·广东清远·阶段练习

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If __________ (observe) the golden rule: reduce, reuse and recycle, we can make a better world for our next generations.

A．observed	B．observing
C．having observed	D．not observing

Though having lived abroad for many years, a lot of Chinese still ________ the traditional customs.

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