Before ___ back home,I always finish my homework

问题描述:

Before ___ back home,I always finish my homework
A coming B my parents come C I came D my parents return

B.题意是说:在父母回家之前,我总是能完成作业.A答案逻辑不对,如果是自己先完成作业在回家,应该是go home,而不是come; C答案时态不对,题干是一般现在时态; D答案则是return用错了,它不能和back一起用.