Unless ________ to speak,you should remain silent at the conference [ ]

All the old paintings were well-preserved when they were discovered by the farmer.The underlined part means _______.

o the sea captain’s surprise, hefound thattravel could also be quitepleasant.

Time is money.- But I think time is _____money.

Will teachers _____ by computers in the future, Tony–Maybe yes, maybe no. But I’m sure we’ll learn from both of them.