题目内容

At what age are children able to d_____ between right and wrong?

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The a_____ of the security arrangements has been questioned.有人质疑安全措施是否充分。

The f_____ of the heart is to pump blood through the body. 心脏的功能就是把血液输往全身。

...but unfortunately, many factors have caused a major upset in the flow and use of fresh water and have caused massive crises in many regions of the earth.

This means if we do nothing in terms of preserving and using water wisely, it is only a matter of time before all regions begin to experience water crises and all the repercussions that come with it.