For most informal dinners, you should wear comfortable and ______ clothes.
| A．official | B．formal | C．casual | D．proper |
The agent promised to keep the family members fully ______ of any developments.
| A．inform |
| B．informing |
| C．informed |
| D．being informed |
It was unusual that such close neighbors ______ not know one another.
| A．could |
| B．would |
| C．must |
| D．should |
It’s always hard to remember a name when one doesn’t have a face to go with ______.
| A．him |
| B．it |
| C．her |
| D．one |
Sometimes, ______ a patient a get-well card is better than visiting him.
| A．to be sent |
| B．being sent |
| C．having sent |
| D．sending |
The report aims to explain how these conclusions ______.
| A．were reached |
| B．had been reached |
| C．have reached |
| D．had reached |