I'll let you know as soon as Tom --- (return)home.

要用is impatient with
如：
Sometimes he is very impatient with his wife.
有时候他对妻子非常没有耐心.


第二个如果表示【在】注意, 最好用进行时态, 即：
more and more companies are paying attention to

重视这个意思最好用attach importance to
如：
The old man didn't seem to attach any importance to the question.
这老人似乎一点也不重视这个问题.
所以最好改为：
more and more companies are attaching importance to


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