--Where does the rain come from? --It comes from the___. A. sun B. clouds C. river
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
Henaughty now . A. isn’t B. wasn’t C. weren’tx
_____ they have a picnic tomorrow? A Did B Are C Will