【填空题】
A、Ⅰ+Ⅱ+Ⅲ+Ⅴ B、Ⅰ+Ⅱ+Ⅲ+Ⅳ C、Ⅰ+Ⅳ+Ⅴ+Ⅵ D、Ⅰ+Ⅱ+Ⅲ+Ⅵ
A、He's good at fixing things. B、He can speak good German. C、He does the washingup after supper D、He's a language teacher.
A、failure of the fuel pumps B、starting air pressure too low C、stop valve in air line closed D、the turning gear still engaged