题目

16. The politician has been warned that he would be getting into great trouble_____stick to his standpoint. A. were he to        B. he will C. he was to         D. would he 答案：A 解析: 选A。表示对将来情况的虚拟，条件从句的形式是：should + 动词原形；were to + 动词原形或一般过去时态。把if去掉，应使用倒装形式，故答案为A。5．制作洋葱表皮细胞临时装片时，下列步骤正确的是（　　）A．用餐巾纸擦拭载玻片B．将盖玻片的一边先接触水滴，再缓缓盖下C．将洋葱块直接放置在显微镜下观察D．染色时，掀开盖玻片，滴入碘液