Eric is so careful that he always looks over his exercises to ________ there are no mistakes.
| A．make sure | B．find out | C．think of | D．look for |
We can ask him for advice at any time ________ during his holidays.
| A．except | B．except for | C．but | D．so |
Would you like to tell me how to ________ at the table?
| A．take | B．behave | C．put | D．smell |
If you are invited to a dinner , you have to be there _______.
| A．at times | B．on time | C．behind time | D．in time |
I took the wrong buss when I came to the city__________.
| A．for one time | B．at the first time |
| C．with first time | D．for the first time |
You’re supposed to_______instead of _______ in Korea.
| A．bow; shake hands | B．bow; shaking hands |
| C．bowing,shake hands | D．bowing,shaking hands |