– You don’t look . Are you ill ? - No , I’m just a bit tired .
-Look, your sister is playing the piano over there. -She ______ be my sister. She has gone to America.
It is polite ______ you to give seats to the elderly.
-Why are there a lot of dead fish in the river? -Because they were ______ by the polluted water.
- Thank you so much for the gift. -_______.
_______ points you get, _______ levels you’ll go to.