They need to clean the glasses.
举一反三
- You ________ clean that room. It is very clean now. A: must B: have to C: need to D: don’t need to
- No need to clean your laptop.
- —_______ water do you need? —Two glasses． A: A．How many B: B．How much C: C．How long D: D．How often
- How dirty the tables are! They need ( ). A: to clean B: cleaning C: to be cleaning D: cleaned
- We need to do something to keep our classroom _____. A: cleaning B: clean C: cleaned