It’s the protection for the trees ___ really matters, _____ how many trees are planted each year.

He came all the way to China for promoting friendship        for making money.

Around 1850,a terrible disease ______the potato crop,and potatoes ______bad in the soil.

With the electricity __________, people use candles instead.

— You should have told her about the meaning of the gesture.— I meant ______, but I had some unexpected guests.