_____ to his work, the scientist didn’t get married all his life.
| A．Devoted | B．Devoting |
| C．Devote | D．To devote |
—Is John coming by train？
—He should, but he ＿ not． He likes driving his car.
| A．must | B．can | C．need | D．may |
I told Sally how to get here, but perhaps I _________ for her.
| A．had to write it out | B．must have written it out |
| C．should have written it out | D．ought to write it out |
I was really anxious about you. You ＿home without a word.
| A．mustn't leave | B．shouldn't have left |
| C．couldn't have left | D．needn't leave |
My sister met him at the Grand Theater 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 |
Sorry I'm late． I ＿＿＿＿＿ have turned off the alarm clock and gone back to sleep again.
| A．might | B．should | C．can | D．will |