With the word PM 2.5 ________ appearing in media reports, people pay greater attention to it and seek health tips for smoggy days.
________he realized it was too late to return home.
– Tom spent his childhood in England . Is it true? --- No. It was in China ______he spent his childhood.
-_________progress you have made this year! ---Thank you. But I have a long way to go.
_________, so she had to be sent to hospital.
Without your help, I _____the exam last term.