rbon lifestyle is of great benefit toimprove the world environment, but the problem is difficult to _________．

I have _________about it.

How do you feel about our manager—MrYang? —He is very easy­goingI feel ____ when I stay with him

The world’s population is getting larger and larger,so scientists are trying to ______ new ways to solve the food shortage.

Traditionally, college students hold a graduation ceremony to encourage themselves before they ______ on their life journey.