--- The shop is _______ on Saturday and Sunday. We can go shopping there on weekdays.---Oh, no. It since last Saturday.
1 wanted to explain , but he didn’t give me any .
一Be careful ,you will make mistakes in your exams. —I know that,Mum. One can never be too careful.
—has your friend studied English? —Since 2001.
We each other since the year of 1948.
—Where is your father? —He to Australia on business.