金黄色葡萄球菌肠毒素检测作业指导书--胶体金免疫层析法检出限为（）PPB。
A、1-5
B、1-10
C、1-15
D、1-20
参考答案：B
I________you some money, but I hadn't any on me then. [ ]
A. would lend
B. would have lent
C. could lend
D. may have lent
