题目

—There _______ a football match this evening.                —Exciting news.               A. are going to be  B. is going to be C. is going to have  D. will have 答案： B     There is going to be . . . 不能与have连用，故选B。电饭煲具有保温和加热功能，晓东同学设计了如图所示的模拟电路（R1＞R2），其中保温状态和加热状态电功率都最小的是A. B. C. D.