Question

his mother often helps him to clean

( ) 1.he often helps his mother_____ the room.
A.cleaning B.cleans
C.clean D.cleaned
( ) 2.Tom and John arrived,but _____students in the class weren'tin.
A.anther B.others
C.the others D.the other
要求：翻译以上两道题,给出正确答案,并说明为什么选这个答案（最重要的一点啊）
thanks!
1.选C，但我想知道为什么？
但是为什么不用cleans

Answer 1

1.C
固定结构help sb to do sth/help sb do sth
2.D
从student可以看出前面要填个形容词
排除B,C而anther是代表其他（同类物品但不一定是同一个）的单数名词.
所以选择D