.(上海卷25). Sean has formed the habit of jogging the tree-lined avenue for two hours every day.
It’s difficult to ___ these old books for some of them ______ none of the classification.
Many kinds of animals and plants die _________ every year.
We should do something to _______ the plant ______ the cold weather.
I’d appreciate _______ if you would teach me how to use the computer.
John thinks it would be long ________ he is ready for his new job.