Teterboro is the same airport where a plane took off earlier this morning before colliding (碰撞)with a sightseeing helicopter over the Hudson River.

_______ does your sister walk her dog ?—Once a day.[ ]

We must try our best to the river being polluted any more.

Ge You is ______ popular film star in China, who likes listening to music.

We still enjoyed ourselves on the Great Wall —–there were—— people during the holiday.