201×47=____
在“甲肝”流行期间，人们实施保护水源，消毒餐具等行为，属于预防传染病措施中的（ ）
—是的。你现在可以穿过马路。
—____you____the green light?
—Yes. You can cross the ____now.
It was very ____(令人不安的) to hear of your father’s illness
