The little boy, out of curiosity, _______ the toy to see how it worked, but couldn’t put it together.

You’d better    smoking, or you will get ill.

Many students joined in the ____ race in the sports meeting to be held next week.

My uncle hasn't been able to quit smoking, but at least he has_____ 

---How could you ______me so easily in the crowd ?--- Because you are so tall and handsome.