Carol, there was a phone call for you. It was a girl’s .

27—- MrWang got the first prize in the singing competition last week.—- OhThat’s what he ______ for years

Everyone was on time for the meeting—_________ Chris,who’s usually ten minutes late for everything

If you often feel tired and can’t focus your attention, that is________you have to stop working toohard and to have a rest[ ]

Just as the tree is the unit of a forest and the book the unit of a library, ______ the molecule is the unit of matter