人教版丨九年级上册英语语法专项练习by doing (sth.)一、单项选择1. Dick decided to lose weight by _ less and doing more exercise.A. eat B. eating C. eats D. to eat2. I tried to make the baby stop crying by _ and that worked well at last.A. to sing B. singing C. sing D. sings3. _ do you learn English so well?By working hard and asking the teachers for help.A. How B. Where C. When D. Why4. How do you learn English words?_ making word cards.A. To B. By C. For D. With