我国人口最多和最少的省级行政区分别是[ ]
A、四川和西藏
B、河南和西藏
C、河南和澳门
D、重庆和西藏
答案：C
命题“同旁内角互补”中，题设是______，结论是______．
Last Monday, I was asked to give the new students a test ______ their English level.[ ]
A. grading
B. to have graded
C. to grade
D. having graded
