The new online library makes possible for students to choose books by smart phone off campus．
| A．it | B．one | C．that | D．this |
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．shouldn't have eaten | D．mustn't eaten |
He hesitated for a moment before kicking the ball，otherwise he ________ a goal.
| A．had scored | B．scored |
| C．would score | D．would have scored |
My sister met him at the Grand Theatre yesterday afternoon，so he ________ your lecture.
| A．couldn't have attended | B．needn't have attended |
| C．mustn't have attended | D．shouldn't have attended |
Mr.Bush is on time for everything.How ________ it be that he was late for the opening ceremony.
| A．can | B．should | C．may | D．must |
—Are you coming to Jeff's party?
—I'm not sure.I ________ go to the concert instead.
| A．must | B．would | C．should | D．might |