I’m now in New York with my friend Jenny. We ______ by plane on Monday.

The lack of eco-friendly habits among the public is thought to be a major ____ of global climate change.

Itlooks heavy Can I give you a hand—_______

_______ difficulty we meet with, we must finish it on time, because the opportunity is_______ valuable．

It is impossible for humans to live on the moon_______ there is no water_______ air there.