—Is your father ___ home?
—No，he’s working late ____ the office.
| A．on | B．at | C．of | D．to |
My mother is strict both _____ me and ____ her work.
| A．with; with | B．with; in | C．in; in | D．in; with |
------ Do you know where Li Ming is working _____? ------ Maybe in Guangzhou, I think.
| A．at first | B．at least | C．at last | D．at present |
You should keep working hard ____ you have passed the exam.
| A．since | B．because | C．so | D．even though |
Li Ming is in poor health. He should pay more attention _________ exercise.
| A．to take | B．to taking | C．for taking | D．in taking |
______, the boy won the prize.
| A．In surprise | B．To our surprise | C．Be surprised | D．Be surprising |