If he worked more slowly, he __...

Câu hỏi: If he worked more slowly, he _____ (not make) so many mistakes.

A. doesn’t make 

B.  won’t make

C. wouldn’t make 

D. hadn’t made

A. for learning

B.  learning

C. to learn

D. learned

A. refuses

B. refused

C. had refused

D. would refuse.