Do remember to be________. We must avoid any possible risks when doing this dangerous chemical experiment—burns, poisonous gases or cuts from broken tubes.
In a room above the store, where a party _____, some workers were busily setting the table.
Most people think that it is _____ to spend some time surfing the Internet, but we shouldn’t be too dependent on it.
--- Have you handed in your schoolwork yet? ---Yes, I have.I guess it _____ now.
We _____ have bought so much food now that Suzie won’t be with us for dinner.
By the time you wake up tomorrow morning, we _____ in the USA. A.arriveB.arrived C.are arriving D.will have arrived