It ______ me about 10 days ______ painting the walls.
The Great Wall is famous lots of visitors all over the world come to visit it every year.
__________ 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.