His schoolbag is on the sofa, his pencil-box is not.
A．and B．but C．or D．so
答案
B
【详解】
句意：他的书包在沙发上，但是他的铅笔盒不在。and表示并列，but表示转折，or否则，so所以；根据句意可知，前后句子之间有转折关系，表示“但是”，故用but, 故选B。
Ted has ten soccer balls, _____he doesn't play them．
A．and B．with C．but D．of
Don’t fight in class __________don’t run in the hallways．
A．or B．so C．but D．and
Susan is good-looking，__________she’s a little hit short．
A．so B．with C．or D．but
Jane, please turn off the lights ______ you leave the classroom.
A．after B．before C．until D．but
--Hurry up! The bus is coming．
--Wait a minute．Don't cross the street ________ the traffic lights are green．
A．until B．after C．while D．since
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