We spend about an hour a day ().a:do our homework .b:doing our homework .c:to do our homework .d:to

问题描述:

We spend about an hour a day ().a:do our homework .b:doing our homework .c:to do our homework .d:to

B 因为spend 后面加doing

正确答案是B,spend doing something 是固定用法,花费时间做某事。

a

C,肯定选C,spend sometime to do something.固定搭配

B

b doing our homework

B
spend + 时间 + doing 是固定搭配