If we work hard, we can overcome any difficulty, ________ difficulty it is.[ ]

Going out is________ good means of relaxation. Wouldyou like to go to ________ with me in the afternoon

You’d better come back earlier _______ it is getting colder

There is 8-year-old boy playing Chinese chess with his friend in the classroom.

It’s important for us to protect nature because we its rich resources to live.