Question

---______ he to smoke?

---Yes, he ______. But now he doesn't.

1. A.
   used; used
2. B.
   used; used to
3. C.
   Did; used to
4. D.
   Used; did

Answer 1

B
解析：used to do疑问式有两种：①Used+主语+to do sth? ②Did+主语+use to do sth? 若疑问形式用did，回答也相同；若用used提问，回答也用used to。