参考答案

正确答案：D
解析：situation: 形势；状况；事态：The situation is very difficult. 处境很困难。conditions: 情况；状态；the condition of weightlessness 失重状态：The car is in very good condition. 这辆汽车情况良好。circumstances: (1) 情形；情况：the whole circumstance全部情况 (1) (pl)环境：The circumstances forced me to accept. 环境迫使我不得不同意。environment: 环境，周围环境：home environment 家庭环境：The children have a happy environment at school.孩子们在学校有一个快乐的环境。