英语高手帮我看看这句话的时态吧,总觉得有问题,谢谢!While in some countries people’s basic supply and nutritious needs have been met, they began to pursue better health.

时态混淆。如果WHILE条件句用现在完成时，主句用现在时；如果WHILE条件句用过去完成时，主句用过去时。

我觉得是对的

有问题，前后不一致。两种改法，无上下文，无法确定哪种更合适。
1.While...have been met, they begin to....
2.While...had been met, they began to....

这样应该是对的吧：
While in some countries people’s basic supply and nutritious needs had been met, they began to pursue better health.
或者While in some countries people’s basic supply and nutritious needs have been met, they begin to pursue better health.

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began改成begin。
因为，结合前半句，你这句话时态都是现在完成时。所以，再结合句意，后半句的谓语动词是一般现在时即可