I just saw Peter in the library．
It _______ be him． He is studying in the classroom．（ ）
A．needn'tB．mustn'tC．shouldn'tD．can't
Parents should let children home and find more about the world． After all，birds should fly in the sky．（ ）
A．leaveB．to leaveC．leavesD．leaving
special the classes are! They have learned a lot about drawing．（ ）
A．WhatB．What aC．How aD．How
I don't have juice． Would you like to get for me？（ ）
A．some； someB．any； someC．some； anyD．any； any
How do you often communicate with each other？
We often send e﹣mail or write letter．（ ）
A．a；aB．a； anC．an；aD．an； an
Don't throw rubbish everywhere． Building a civilized（文明的） school yard is our duty．
．（ ）
A．OK，I willB．You are joking
C．Take it easyD．Sorry， I won't