单项选择题
A.time B.period C.length D.long
A. The warming of the world’s oceans is not a threat. B. That not enough is being done about global warming. C. There is a puzzling gap between the model and observations. D. Ocean waters have warmed faster than scientists had previously thought.
A. they do not reach their objectives B. they do not contact parents C. children escape from school D. they meet their targets