语法与词汇 71.It's apparent that the wooden bridge is not strong enough to______the weight of a lorry.
【正确答案】 B
【答案解析】考查动词辨义。retain“容纳，保留”；sustain“遭受，支撑”；obtain“获得，得到”：main—tain“维持，维修”。这里是说桥不能支撑卡车，故选B。