They were all asleep. of them heard the sound.
People ______ overweight need more water than thin people.
I hear they are going to London, but I don’t know ________ they will stay there.
My husband always ______ me flowers every week before we got married, but now he never ________.
If we ______ take environmental problems seriously, the earth _______ worse and worse.
— How far is it from Tianjin to Changsha?— It is a _______ flight from Tianjin to Changsha.