I can think of many cases _______students obviously knew a lot of English words and expressions but couldn't write a good essay.
_______it rain tomorrow. we would have to cancel the football match.
—____ you got the news that the rocket was sent up successfully? —From the radio.
—Were all the passengers on the bus injured in the accident? —No, _______ only the four who got hurt.
Facts prove that the world’s economic development is not a win-lose game but one in which all be winners.
Everyone here will thank the firefighter for the things they have done to prevent fires______ the environment safer.