改进题：His plane developed engine trouble only seven miles after ta

改进题：His plane developed engine trouble only seven miles after take-off.

译文：他的飞机发生了机械故障，仅在起飞后七英里后。
【正确答案】：改进的译文：他的飞机在起飞后只飞行了七英里就发生了机械故障。
【题目解析】：p24