(2013·四川省乐山一模)The pupils were playing games in the classroom ________ a gunman entered and began shooting wildly at them

Mr. Li is badly ill in hospital.—________.

Oprah (奥普拉 ) , thequeen ofAmericandaytimetalk TV,is _______one of the most powerful women in thewo rld. [ ]

According to ______ survey，there’re more and more young people who go for a walk at ______ dusk instead of sitting in front of the computer.

The match will start in 20 minutes. The players have time to_____.