—Jack, you seem excited.—______? I won the first prize in the English speech contest.
—Is Nick coming by train?—He should, but he ________ not. He likes driving his car.
—In case anyone ________ come in my absence, tell him I will be back soon.—Sure, I will.
John ________ yet, or he would have telephoned me.
—She looks very happy. She ________ have passed the exam.—I guess so. It's not difficult after all.
A survey has shown that 40% of those killed in traffic accidents ________ if they had been wearing seat belts.