She tried to stay calm on the stage, but her trembling voice _______ her nervousness.
----- Why not play the music we listened to to yesterday?----Because it _____old times.
---Go and get Lily to write for the wall newspaper. ----Why _______?couldn’t I do better?
It is thought that one billion people I the world, ______is half the word’s workers, earn their living by farming.
—Hold the ladder for me! —That’s ______
I think I was at school, ______I was staying with a friend during the vacation when I heard the news.