---Does my question sound ________ enough?---I don’t think so. You can ask more ________ by using “could” instead of “can”.
“you ever by listening to tapes?” “Yes, I have.”
When you find some new words, you’d better in the dictionary.
Our teacher added that watching English-language TV also helpful.
“do you study a test?” “I study by reading the textbook.”
The air pollution in this area caused the of many trees.