It is the first time that I ______________ such a beautiful scene.
| A．saw | B．see | C．had seen | D．have seen |
Your teacher ________ very angry at that moment because you talked back to her like that.
| A．should have been | B．must have been |
| C．must be | D．might have been |
Thanks to my teacher's valuable help, otherwise I ________ my college entrance exam.
| A．can't pass | B．hadn't passed |
| C．would not have passed | D．have not passed |
Oh, I'm not feeling well in the stomach. I ________ so much fried chicken just now.
| A．shouldn't eat | B．mustn't have eaten |
| C．mustn't eat | D．shouldn't have eaten |
She often shares her deepest thoughts and fears with friends through QQ, as if they ________ chatting in her living room.
| A．were | B．are |
| C．had been | D．has been |
—The research on the new flu virus vaccine is challenging and demanding. Who do you think can do the job?
—________ my students have a try?
| A．May | B．Must |
| C．Will | D．Shall |