It is only 6.7% of Korean students _____ have ever read Chinese books or watch Chinese TV programs.
All substances, _____ solids, liquids, or gases, are made up of entirely atoms.
—— How about the number of students playing on the playground? —— _____.
—— He promised to come to see you. —— But he _____. I’ve been all alone.
_____, you have given me a lot of help.
—— Coffee _____ milk? —— Only milk, please, _____ I used to like coffee.