Mary couldn’t go to the cinema with us because she had to her little brother.Alook for

问题补充：

Mary couldn’t go to the cinema with us because she had to her little brother.

Alook for

Blook after

Clook at

Dlook into

答案：

A. look for

(答案→)B. look after

C. look at

D. look into

解析：考查动词短语的区别，look for 寻找、look after 照顾、look at 看、根据句意，故选B.