By the time he realizes the mistake he _____, it will be too late for him to do anything about it. [ ]

One of the most important questions they had toconsider was _______ of public health.

Living in _______ ever increasingly fast-paced world,we are facing greater competition, so we must take _______ advantage of everyopportunity to develop.

__________ is often the cThat

What’s Tom like —He’s _______ .He always gives the seat on the bus to someone.