题目

I left for the office earlier than usual this morning _____ traffic jam.    A. in line with                                B. in case of   C. for the sake of                            D. at the risk of 答案：B. in case of 解析: in case of 参看Ⅲ,94注释。In line with (=in agreement with) 与......一致, 符合：His actions were not in line with his belief.本句中in line with...作表语。In line with history and social evolution socialism is inevitable.本句中in line with引导地短语作状语, 意为“按照”。For the sake of 为了......起见。At the sake of冒......的风险 以下关于基因突变的叙述中，正确的是 A．自然状态下生物的突变率是很低的 B．基因突变在光学显微镜下能观察到 C．突变后的性状都不能遗传给后代 D．生物体所发生的突变通常是有害的