red is a symbol of warmth, it can sometimes make people feel uneasy or even frightened.
Sorry, sir, but you can’t go any further without______boarding pass. Please obey ____ rule.
Eyes ________, I see the moon so bright; Head ________, in homesickness I am drowned.
The shoes are of high quality and ________ long.
--The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job? --________ my students have a try?
--How much salt did you put in the soup? --I’m sorry to say, ________. I forget.