题目

—Kelly, how was Huangguoshu Waterfall?—________ ！I really enjoyed myself there.A.Sounds like a good idea B.I don’t knowC.It was fantastic D.That’s for sure 答案：【答案】C【解析】句意：——Kelly，黄果树瀑布怎么样？——好极了！我在那里玩的确实很高兴。考查情景交际。Sounds like a good idea听起来像一个好主意；I don’t know我不知道；It was fantastic好极了；That’s for sure那是肯定的，根据问句“how was Huangguoshu Waterfall?”和后面的“I really enjoyed myself there”可知，已知定义域为R的函数 （a、b∈R）有最大值和最小值，且最大值与最小值的和为6，则3a-2b= （ ）A．7 B．8 C．9 D．1