______ this afternoon, you would have to come again next week．
| A．The boss didn’t return | B．The boss were not to return |
| C．Were the boss not to return | D．Didn’t the boss return |
The plane ________ when I arrived at the airport．
| A．have gone | B．went |
| C．is going | D．had gone |
_____ is a possibility _____ Tom will get first place in the long jump.
| A．There; that | B．It; that |
| C．There; whether | D．It; whether |
He is ________ experienced teacher in our school.
| A．a | B．an | C．the | D．/ |
At present, you do meet with some difficulty in English learning, but you will have a good knowledge of it.
| A． by accident | B．in time |
| C．as usual | D．now that |
No one knows the age of the old man wandering in the street all day, but judging from his appearance, he is in his sixties.
| A．approximately | B．exactly |
| C．actually | D．gradually |