1.Don't get off the bus unless it ___.

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1.Don't get off the bus unless it ___.
A.will stop
B.has stopped
C.will have stopped
D.stops
B）
2.It ___ nothing to be polite.
A.takes
B.spends
C.costs
D.pays
C）

1,第一个表示已经完成的动作,等车停稳了才下车.而A肯定不对,因为表将来,C也不对,D表示一般现在时,是指车停的动作,但是未有表示车停稳.2,take,spend,pay 表示花费时间精力金钱等,而且花费后往往有相应的成果,你花钱去买车得到车,你花时间去学习,得到成果.而cost 有花费金钱时间的意思,但更多的是表示付出了什么代价,而往往却是没有报酬,结果,让你有损失.这句是说讲礼貌又不会让你损失什么,所以选C.

1.Don't get off the bus unless it ___. Don't get off the bus until it ___. Don`t get off the bus until it ___(stop) 1. Don't get off the bus until it ______. Don't get off the bus ___ it has stopped 单项选择 Don't get off the bus until it ____ Don't get off the bus until it stopping 16.Don’t get off the bus until it _________ . don't get on the bus ()it has stopped A until B unless 1.Don't get off ( ) the bus stops Don't get off the bus until it stops.能不能换成Don't get out of t 把Don't get off the bus until it had stopped.翻译成中文