—What about going shopping together? —Sorry I have a lot of homework . A. do B. to doC. d

问题补充：

—What about going shopping together?

—Sorry, I have a lot of homework .

A. do

B. to do

C. doing

D. did

答案：

A. do

(答案→)B. to do

C. doing

D. did

解析：句意：一起去逛街怎么样？对不起，我还有很多作业要做。句型have sth. to do有某事要做，后接动词的不定式做定语，故选B。