He must have been very nervous when speaking. Did you _____ that his hand was shaking

Jack_____out very early, for he had not shown up at breakfast.A．could have goneB．must have

【C17】A．must have beenB．may have beenC．could have beenD．should have been

How did Philip feel in the end？A．He was ashamed of himself.B．He was very nervous.C．He was

He works incredibly hard and yet needs very little sleep—he must have a strong______.A．con

He must have had an accident, or he _____ thenA:would have been hereB:would be hereC:s

A．must have been providedB．might have providedC．m