The good thing about the children is that they ________ very easily to new environments.

We allow     in the woods but anyone is forbidden      here.

The sad mother ______ crying when the reporter asked about her son’s death.

With more and more farmers moving to cities, an inadequate labor force is ________ becoming a major factor affecting the country's grain output.

He thought that as he had worked for the company for so long, he     higher pay.