【单选题】— There are too many 'problem children' in our school. Many teachers are anxious about it. It will be a big problem. — That's right. What do you think ______? [ ]
【简答题】A.We waste too much oil and so there is a high risk of accidents. B.There are too many oil tankers having accidents. C.Because we use so much oil there is a higher risk of accidents and oil spillage. ...