The boy is taller than_____ in his class.
---Who can tell me_______? ---Every 15 minutes.
---Few young people in China know about Lady Gaga , _______?---_______, she is quite famous here in China.
–Look! A man is cutting a tree on the moon.--It ______ be true. The teacher said there is no air on the moon.
All of us went to the park ______ Bob. He had to look after his sister.
I wonder when they ___ for Beijing. I will go to the train station to see them off whenthey ______.