_____ by the clear waters, this forest provides visitors with a wonderful chance to see some endangered native birds in the wild.
| A．Being surrounded | B．Surrounding | C．Surrounded | D．To be surrounded |
In order to find the missing boy, the young couple all they can over the past twenty-four hours.
| A．do | B．did | C．have been doing | D．had done |
The young manager is well known for his problem-solving skills, ________ is important for a successful leader.
| A．it | B．that | C．what | D．which |
Not until he had left his friend _______ how important friendship was for him.
| A．did he realize | B．he realized | C．had he realized | D．he had realized |
My father worked day and night. Otherwise, there ________ no one to support the family.
| A．would be | B．must be | C．would have been | D．must have been |
The interviewer will begin to judge you as soon as he or she ________ you in the waiting room.
| A．sees | B．will see | C．is seeing | D．saw |