It seems that living green is               easy and affordable. A small step makes a big difference.

We didn’t know you were in trouble at that time; _______ we would have given you a hand.

— What do you think is ______ to happen tomorrow? — Sorry, I don’t know.

Kids talk frequently about what they can do, __________ many adults do the opposite, tending to talk about what they can’t and why.

—What do you think of Zhang Liang Ying's English songs?—Very attractive and lively. Almost no other Super Girls can sing ______ at present, I think.