用所给动词的正确形式填空
“Please be quiet．No ________ (talk)!” said our biology teacher．
用适当的情态动词填空
1．________you help me, please?
2．Don't eat in class．But you ________ eat in the cafeteria．
3．Your key ________ be in your pocket．I saw it in the classroom just now．
4．You ________ study hard because you are a student．
－________ I finish my homework now?
－No, you needn't．
－May we come a little late?
－No, you________．
1．________ we put our coats here?
2．Mother was ill yesterday, I ________ look after her at home．
3．They are our rules．You ________ obey them．
用括号中所给词的适当形式填空
The teacher is having class．Don't ________ (talk) loudly．
Wearing a smile on your face not only helps you make friends but also makes you ________ (feel) better．
I ________(forget) my homework yesterday．
Do you enjoy ________ (live) in China?
The background music sounds ________ (noise)．Please turn it down．