Some of the rubbish, such as wood, paper and iron,_____ away over a long period of time.

.We won’t know how much food to buy until we decide how many people ________

–Do you think that we should make preparations for thecompetition in advance -Exactly. ______.

Miss Li always tries her best to create an atmospherein class ______ can help her students practice their speaking skills

Please _______the light when you leave the classroom.