Bad habits, _______ formed, are difficult, and sometimes impossible to shake off.
| A．before | B．once | C．until | D．unless |
If you make__ most of forty-five minutes classes day after day, there will be ______switch in grades.
| A．/; / | B．the; / | C．/; a | D．the ; a |
I strongly suggest the person ________ out and explain all that has happened.
| A．referred to stand | B．was referred to stand |
| C．was referred to standing | D．referred to standing |
— Shall I open the window to let some fresh air in? —No，________ .
| A．I’d rather not | B．I’d rather you not |
| C．I’d rather you didn’t | D．I’d like not to |
If you don’t know that _____ is the mother of success, you are sure to be _____ in life.
| A．failure; failure | B．a failure; a failure |
| C．a failure; failure | D．failure; a failure |
It is everyone’s duty to ______the rules of our school.
| A．watch | B．observe | C．notice | D．see |