We share the resources of the world, ______ any action of waste can affect other people.
| A．so | B．if | C．unless | D．because |
Mary, __________ here — everybody else, stay where you are.
| A．come | B．comes |
| C．to come | D．coming |
__________ and happy, Tony stood up and accepted the prize.
| A．Surprising | B．Surprised |
| C．Being surprised | D．To be surprising |
Isn’t it time you got down to __________ the papers?
| A．mark | B．be marked |
| C．being marked | D．marking |
It remains __________ whether Jim’ll be fit enough to play in the finals.
| A．seen | B．to be seen |
| C．seeing | D．to see |
__________ with so much trouble, we failed to complete the task on time.
| A．Faced | B．Face |
| C．Facing | D．To face |