下列各句中，加点的成语使用最恰当的一项是（ ）

How do you usually go to work—I often go to work __________. Walking is good for our health.

There are many reasons why some children have bad manners, ______ is the ill information on the Internet and in TV programme．

Do you mind me closing the window It’s a bit cold.— ________. Do it, please.

Not until he left his home________to knowhow important the family was for him