I didn’t know ________.
The traffic is moving very slowly as so many cars on their way back to Shanghai.
Students are encouraged to share their learning experience__________ their classmates.
More and more people in Shanghai choose to go to work__________ underground.
Do you see that good-looking young man? is a famous Korean film star.
Garden School is very famous and it’s Mary’s first choice. Which of the following is correct for the underlined word?