题干
一I hear you have a home robot．
一Yes，it's amazing. It do all my housework．
A：must
B：should
C：could
D：can
答案(点此获取答案解析）
D
一I hear you have a home robot．
一Yes，it's amazing. It do all my housework．
A：must
B：should
C：could
D：can
