Let him _______ a rest. I think he must be tired after the long walk.
A:has
B:have
C:to have
D:having
每个盘子放3个苹果,能够放____盘,将这12个苹果平均分给6个小朋友,每个小朋友分到____个。
实验课上,赵老师指着一平敞口放置的氢氧化钠溶液说它变质了.同学们对其中的溶质做了猜想.