— She is too busy to help us finish the work.— Let’s do it ________.
Now the air in Yancheng is than it used to be. Something must be done to stop it.
Miss Liu is English teacher. She teaches English very well.
bad weather ! I can do something but to stay in bed for the whole day.
---How long did it _____ you to work out the difficult maths problems?---I ______ about half an hour on it .
It is very _______ of you to speak in front of all those people .