26. You should ask Bob ________ his own clothes. He is ten years old now.
A. wash B. washes C. washing D. to wash
27. It’s sports time. Most ________ students in Class 1 are playing football on the playground.
A. boy B. boys C. boy’s D. boys’
28. ---Must we finish the work today?
---________. We have something else to do tomorrow.
A. Yes, we can B. No, we can’t
C. Yes, we must D. No, we needn’t