Question

－Shall we go out for a swim? －Sorry,I can't．I ________ housework for my mother now． [　　] A． am doing B． is doing C． are doing D． did

Answer 1

答案：A
解析：

考查动词时态。句意为：“我不能出去游泳，(因为)我现在正在为我妈妈做家务”。后有now，故用现在进行时。选A。