题干
Meng Peij ie，an ordinary girl who was among the 10 people awarded the title of “Touching China 2011”，must be both optimistic and strong-minded. Otherwise, she _______ her disabled adoptive mother for 12 years.
| A．mustn't have looked after | B．can't have looked after |
| C．couldn't have been looking after | D．shouldn't have looked after |
答案(点此获取答案解析）
