— He didn’t go the concert yesterday, did he? — . He was busy studying for the tests all day.
__________ it’s very difficult, remember not to give up until the last minute.
You will never know the result ______ you try it by yourself.
________ he told the truth this time, nobody was willing to believe him because he often told lies.
___________ you do, remember to look after your parents well.
—Peter, do you know if David _________us in the fashion show this Sunday? —I’m sure if he _________his homework, he will join us.