A-A+
—There is a bad smell here.—Oh dear! I_______
问题详情
—There is a bad smell here.
—Oh, dear! I_______ the gas.
[ A] must forget turning off
[ B ] must forget to turn off
[ C] must have forgotten turning off
[ D] must have forgotten to turn off请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：D
25．D【解析】本题考查情态动词表示推测。推测已经发生过的事情，用musthavedone。forgettodosth.表示忘记去做某事（事情没有做）；forgetdoingsth．表示忘记做过某事（事情已做）。第一句指出，“这里有一股难闻的气味”，由此推知，“我”一定是“忘了”关煤气了。
