Your headmaster would have been happy to give you two days off, if you had gone and explained that your parents ________ ill at the time.
A．were B．had been
C．are D．would be
If we don't hurry up, everything ________ by the time we get to the party.
A．will be eaten B．is eaten
C．has been eaten D．will have been eaten
The vegetables in his field ________ well, because they are pollutionfree.
A．are selling B．have been sold
C．are sold D．sell
—What's the matter with Philips?
—Something must have happened to him. He left home three hours ago, but ________ at the party!
A．didn't arrive B．isn't arriving
C．hadn't arrived D．hasn't arrived
If this product does not give you complete satisfaction, please return it to the manufacturer, stating when it ________.
A．is purchased B．will be purchased
C．purchases D．has purchased
—David, are you listening to me?
—Sorry, Dad. I ________ to make sense of what the reporter said.
A．was trying B．have tried
C．am trying D．tried
