—Why did Miss Wang look so worried when we saw her? —Because she wondered ____. A. where did the other students go B. when would the policeman come C. if her students had survived the earthquake
—hat do you think of genetically modified food (转基因食品)?
—We all think ______ is careless ______ some scientists to say it is safe before doing any experiment.
—Daddy, do you believe I can swim ______ to catch up with Ben!
—Great, dear! But I don’t have ______ to watch your match. I hope to hear your good news.