This is the factory _____my father worked ten years ago.
| A．where | B．that | C．which | D．for the which |
The conference has been held to discuss the effects of tourism ______the wildlife in the area.
A. inB onC. atD. with
Sorry, madam. You’d better come tomorrow because it’s _____the visiting hours.
| A．during | B．at | C．beyond | D．before |
---When do we need to pay the balance?
--- ____ September 30.
| A．In | B．By | C．During | D．Within |
The accident is reported to have occurred _____the first Sunday in February.
A. atB onC. inD. to