—Could you please sweep the floor, Daming?
—________ I’m busy cooking.
Yes, sure.
Sorry, I can’t.
Yes, please.
I don’t think _______ Maths is easy.
Thanks for _________ the new chairperson.
He couldn’t hide his __________ at my success and said bad words about it.
Are you going to __________ this challenge?(挑战)
The boy looks nice ________ white and the red sweater looks good ________ the girl.