My schoolbag is new(新的), _______ my pencil box is old(旧的).
A．and B．but C．so D．or
答案
B
【解析】
句意：我的书包是新的, 但是我的铅笔盒是旧的。and和，而且，表示并列和顺承；but但是，表示转折；so因此，所以；or或者；否则。根据句意可知，前后两个分句之间存在转折关系，故用连词but，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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