—Let’s go dancing tonight.!—Sorry, I ________.I have to go to my guitar lesson. A. mustn’t B. needn’t C. can’t
Things made of plastic are usually _______, but they are _______ to get polluted.
All the club members _______ the floor when they heard someone _______ for help.
A fridge is used to keep food which goes _______ very _______.
—Our P.E. teacher isn’t as young as he _______, is he? —No, but he is one of _______ in our school.
There is _______ with your computer. Why not have it _______?