Twenty years _____ passed since I came to this school, but I feel twenty years _____a short time in my life.

The voice of China has set up a big stage for young people with a talent for music，_________some have stood out among them．

11 It is because people are likely to stayindoors ______ the virus can spread easily ______ people often catch colds

So absorbedin theexperiment that he didn’t even notice it was already over 12 o’clock

The workers recycle the old newspapers ______use them．