一How are you feeling today?
一Much ,I can go to school next week.
A:good
B:better
C:best
D:well
如图所示的电机示意图中,甲是 ____;乙是 ____;两者的原理是:甲: ____;乙: ____.
黄河中下游含沙量大的重要原因是( )
It will be hard for us to get up in the morning if we ___________ to bed too late.