单项选择题
Physics is Ihc prcscni-day equivalent of （） used to be called natural philosophy, from which most of the present-day science arose.
A.that B.all C.which D.what
单项选择题 It's time （） about the traffic problem downtown.
单项选择题 The company （） a rise in salary for ages, bul nothing has happened yer.
单项选择题 The presidential candidate （） his position by winning several primary elections.
