We have ________ some organizations to help the poor students in the western areas of China.
Tom’s never been late for school before, _______ ?
--Let’s go fishing if it ______ this weekend. --But nobody knows if it ______.
The old man lives ____ in the ______ forest, but he never feels ______.
I’m _______ thirsty, can you give me _____ water?
--____ has your grandpa lived here? --Since last year.