单项选择题
A.解放前,劳动人民艰苦劳动,结果只能过贫苦生活。 B.解放前,劳动人民工作努力,但还是过贫苦生活。 C.解放前,穷人拼命劳动,结果生活还是困难。 D.解放前,工人们艰难挣扎只为摆脱贫困生活。
A.ahead one hour in each new time zone B.ahead one hour for the whole trip C.back one full day for each time zone D.ahead by twenty-three hour
A.make fewer errors B.do not have to be programmed C.work more quickly D.understand their instructions