题目

The weather turned out to be fine yesterday, I ________ the trouble to carry my umbrella with me. A. should have taken         B. could have taken C. needn’t have taken        D. mustn’t have taken   答案：C  考查虚拟语气。句意：我们没有必要找麻烦带伞。此处needn’t have taken表示“没有必要做的事做了”。  最高位是千万位的数是 位数，一个七位数的最高位是 位．