It is generally believed that reading is______it is ascience [ ]

It’s a pity that you ______ leave so soon. It’s been so nice having you here.[ ]

What do you think of the lecture of LiYang s Crazy English —I think it’s_________，but someone thinks it’s muchtoo _______.

It seemed as if the world was ______.

The air is badly ________.And there’s more water _______ in the world.