where is jack?i can't find him anywherehe___his homework upstairs_英语解答

where is jack?i can't find him anywhere
he___his homework upstairs
A might be doing B must do
选什么 why 是不是错了

人气：460 ℃　时间：2020-05-12 10:12:34

解答

jack在哪?到处都找不到他.
补充问题：
A might be doing 表示可能正在做某事
B must do 表一定,必须做
答案选A,题目的意思是：他可能正在楼上做作业.