_______ I went to the South Lake in Hanzhong, I was deeply impressed with its beautiful scenery.
| A．For the first time | B．The first time |
| C．At first | D．It was the first time |
The officer gave orders that anyone _____ a gun should be reported to the police station.
| A．saw take | B．seen taking | C．seeing take | D．seen taken |
----- You seem in low spirits. Anything wrong?
----- I ______ in the important exam. I let my parents down.
| A．fail | B．failed | C．has failed | D．had failed |
A wallet has been found and can be ______ the manager’s office.
| A．claimed | B．announced | C．declared | D．cheered |
----- How did you know the surprising news?
----- I happened _______ the event then.
| A．to cover | B．to be covering | C．covering | D．to have covered |
If the wound ______ become infected, do not hesitate to call me.
| A．shall | B．must | C．should | D．would |