When people cut down big trees, new trees should be planted. ,they will have no trees to cut down in the future.
Learning a foreign language calls for your memory,time,patience and emotions.________ it is not a simple thing.
-I often see him working hard in his spare time. -________he has won the scholarship from time to time.
________your bad work,I am forced to dismiss you.
He made an attempt to________the misunderstanding about the origin of the language.
There is not much time left and every minute ________.