---______haveyoubeendoingyourhomework?---Since6:30thisevening.A.HowoftenB

发布时间：2020-08-07 01:45:50

---______ have you been doing your homework?---Since 6:30 this evening.A.How oftenB.How longC.How soonD.How many times

网友回答

B解析由答语中“Since 6:30 this evening.”可知是表示一段时间的短语，用how long发问。
以上问题属网友观点，不代表本站立场，仅供参考！