They paid fifty percent of _____ they were able to earn to the state．

Criticism and self-criticism _____ necessary _____ it helps us to correct mistakes.

Tom searched carefully in the room _____ he might discover exactly what he needed.

The road back home may be difficult before the Spring Festival, ______ the desire to get together with family members can never be stopped.

Sarah hopes to become a friend of ________shares her interests.

________ we know, the moon goes around the sun.

Baseball requires teamwork _______ tennis is an individual sport.

_______ he was the last man I wanted to see, I did all that I could to help him.

— Shall Mary come to the concert with us？
－Not_____she has finished her paper．

My mother is always warning me when I go out, “Don’t get off the bus ____ it is stopping.”