— The doctor is busy ________ his work.
I don't know what I should do to help him.A. how to do B. what to do C. what to do it
Tim's father is really kind of busy these days.A. a little B. little C. much
My partner wants to be a teacher. I want to be a teacher, too.A. So I do B. So am I C. So do I
She's really nice,and we get on well,but she always borrows my things. A. get off B. get along C. get up
I have run out of the salt. I need to buy some now.A. run out B. run of C. used up