—We really shouldn’t use plastic bags any more when shopping.—_____ It’s important to protect our environment.
—________ in class. You can listen to it after class. —Sorry, Miss Liu.
[ 11·株洲中考]—Let’s go dancing tonight. —Sorry, I ________. I have to go to my guitar lesson. A. mustn’t B. needn’t C. can’t
It’s too dark. I ________ go home.
She has to help her mom ________ dinner today.
We have to ________ uniforms at school.