Mr．Green didn’t understand ________ made his daughter so absent-minded this morning．

Of the making of good books there is noend; neither ______ any end to their influence man’s lives.

How a personto criticism often means the difference between success and failure.

Should another world war _____,what would become ofhuman beings?[ ]

My cousin is _________ sometimes. It’s hard for him to change his mind even though his idea is not right.