As ______along the river bank, she was singing a pop song.
| A．walking | B．walked | C．to walk | D．walk |
She won't go unless________.
| A．invite | B．invited |
| C．will invite | D．are inviting |
He felt rather________that she should drive the car at such a________speed.
| A．frightening；frightening | B．frightened；frightened |
| C．frightening；frightened | D．frightened；frightening |
—You've left the light on.
—Oh.So I have.________and turn it off.
| A．I'll go | B．I've gone | C．I go | D．I'm going |
The girl looked at me with a________expression. Maybe the problem was quite________.
| A．puzzled；puzzling | B．puzzling；puzzled |
| C．puzzled；puzzled | D．puzzling；puzzling |
I can't say which wine is better—it's a(n)________of personal taste.
| A．matter | B．affair | C．event | D．variety |