您要查找的是不是：
- 屋顶安全吗?Is the rooftop safe?
- 吗morphine
- 这里游泳安全吗?Is it safe to swim here?
- 这地区安全吗?Be this area pretty safe?
- 是吗is that right
- 总统不带警卫在人群中行走，安全吗?Is it safe for the President to walk about without a guard?
- 你好吗？How are you?
- 已宣布屋顶有安全隐患。The roof was declared unsafe.
- 你知道吗did you know
- 是吗？Is it really?
- 不是吗isn't it
- 真的吗？No kidding?
- 长期吸入沙美特罗/氟替卡松治疗哮喘安全吗?Inhaled salmeterol/fluticasone in asthma for long term: safe or not?
- 这样可以吗？Is that OK?
- 你还记得我吗？Do you remember me?
- 对吗？Right?
- 这屋顶一点也不漏吗?Is this roof completely watertight?
- 你知道吗？Did you know?
- "你经常去那里吗？" "一月一次。""How often do you go there?" "Once a month."
- 你是文学学士吗？Are you a Bachelor of Arts?
