There is ________”h” and ________”u” in the word “hour”.
| A．an ; a | B．a ;an |
| C．a ; a | D． an; an |
How many states _______ the United States? Fifty.
| A．turn up | B．make up | C．end up | D．give up |
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 |