1. My dog ...can .. understand about 20 words in
Spanish.
a) can to b)can c)is able
2.But can`t understand one word of English.
a)doesn`t can b)can`t c)can not
3.When the people . couldn`t find .. the
survivor, their dogs helped them.
a) couldn`t find b)can`t found c)couldn`t found
4.My dog . b)can`t run .. very fast.
a)doesn`t can run b)can`t run c) cannot runs