There are twentyeight classes in our school，______ over 56 students.
| A．with each has |
| B．each having |
| C．which there are |
| D．with each that has |
I have heard a lot of good things about you________I came back from abroad.
| A．since | B．until |
| C．before | D．when |
She says that she’ll have to close the shop________business improves.
| A．if | B．unless |
| C．after | D．when |
He is so busy.He cannot afford enough time with his son________he wants to.
| A．even if | B．as if |
| C．because | D．before |
The manager wants to see changes in the company，and I am sure he will________.
| A．in particular | B．in turn |
| C．in charge | D．in time |
An artist who was recently traveling on a ferry to the southern island discovered________a long lost antique Greek vase.
| A．at random | B．by chance |
| C．in turn | D．on occasion |