题目

He is not native, if he were, we _______ this discussion over his identity.   A. would not be having                B. are not having          C. had not had                       D. will not have   答案：A  考查虚拟语气。由题意可知是对现在情况的非真实虚拟。  11．已知x2+3x-4=0，求代数式（x+3）2+（x+3）•（2x-3）的值．