题干

Do remember to be ________. We must avoid any possible risks when doing this dangerous chemical experiment—burns, poisonous gases or cuts from broken tubes.
A.cautiousB.thoughtfulC.considerateD.curious
上一题 下一题 0.64难度 单项选择 更新时间:2012-12-24 07:31:43

答案(点此获取答案解析)