He thinks he     attend Tom's party to congratulate him on his success,but he is not sure whether he

will have time this Sunday. [ ]

A. shall            

B. might        

C. would            

D. could

下列与地球自转运动有关的叙述中，正确的是（）

A.地球上不同地点自转线速度都相同

B.地球上任何地点每24小时昼夜都更替一次

C.受惯性离心力影响，地球成为两极稍鼓的旋转椭球体

D.受地转偏向力影响，长江自西向东流的河段，南岸受河水冲刷作用较强