题目

估算是同学们应具备的基本技能之一。下列估算不合理的是() A . 一百米跑步成绩约13秒 B . 中学生体温约37℃ C . 一杯水的体积约200毫升 D . 书桌高度约15厘米 答案:DThe poor boy ________ the test again; in that case, his mother will be very disappointed. [  ] A.must have failedB.might fail C.could have failedD.should fail
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