摘要: If smoking is not allowed in a place, you can put a sign saying: A. Stop Smoking! B. No Smoking!C. Not to Smoke! D. Any One Must Not Smoke!
网址:http://m.1010jiajiao.com/timu_id_27138[举报]
I would help you if I ________, but I'm afraid it's beyond my ability.
- A.am able
- B.can
- C.had been able
- D.could