Jack strawberries.

Sorry, Professor Smith. I didn’t finish the assignment yesterday.—Oh, you___________ have done it as yesterday was the deadline.

The trade caused me $500 worth of loss. –Pity! You didn’t listen to my advice; otherwise, you _________.

Scientists ____ thousands of chemicals before they decided on the right one in the end.

Sam felt he had nothing to the discussion, so he left early.