----How much beef do you need to buy? ----______.
A: Have you heard from Jim?B: No, I haven’t.The underlined part means”_______”.
They usually have lunch at school, ________?
Get up early and do exercise every day, _______you won’t have a strong body.
I don’t know if he _______tomorrow.
Children, will you finish _________the classroom before 5:00 p.m.?