spend some time doing sth.花时间做某事.
finish doing sth.完成了某事.
选Dfinishing doing
I spent half an hour___my homework.Afinish doing Bto finish doing Cfinishing to do Dfinishing doing
I spent half an hour___my homework.Afinish doing Bto finish doing Cfinishing to do Dfinishing doing
英语人气：244 ℃时间：2019-08-17 19:28:44
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