for half an hour的另一种说法

谁能告诉我“for half an hour"的疑问词是什么? My brother e_____ for half an hour. they walked for.A,an hour B.half a hour C,half an hour 选哪个 the class began half an hour ago的同一句 the calss()()()for half we read english for half an hour every day(对for half an hour They go running for half an hour 对for half an hour 提问 My friend runs for half an hour every day?对for half an hour It took me half an hour to look for it.(对half an hour 提问) he runs for half an hour every morning 对划线部分提问画线的是 for half I waited （for） you (for） half an hour He kept ---(wait) for her for about half an hour. She has waited for Daniel for half an hour?（对for half an hou