_____ more visitors， the Beijing Garden Expo Park gives roses to visiting couples．
| A．Attracted | B．Attracting |
| C．To attract | D．Having attracted |
— Why didn’t you give a hand to the boy?
— I _______, but he strggled to his feet before I tried to.
| A．would like to have | B．would like to |
| C．would rather to have | D．would better |
—You didn’t invite Mary to the ball?
—____ her, too?
| A．Must I invite | B．Should I have invited |
| C．Must I have invited | D．Should I invite |
—She joined a football team last fall and was recently made captain.
—Never _____ she'd ever have that much energy.
| A．I had thought | B．I would have thought |
| C．could I have thought | D．will I have thought |
I ____ you, but I didn’t think you would listen to me.
| A．could have told | B．must have told | C．should tell | D．might rell |
—The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?
—____ my students have a try?
| A．Shall | B．Will | C．Could | D．Should |