Mr Smith swimming every weekends. But he do it last week.
What happenedyour head? A in B to C at
Iten then. Now I13. A am was B was am C were am
One day robots will do everything. A一天 B总有一天 C过去一天
Did you ______ a watermelon yesterday? A had B buy C bought
Yesterday, Amy ______her mum cook. A helped B will help C is helping