题目

能使无色酚酞试液变红的溶液,能使紫色石蕊试液变为( )     A.红色     B.蓝色     C.无色        D.不变色 答案：B  –Where do these books _____?--Put them back _____they were.A．go; whereB．lay; whereC．lie; in whichD．lie; which