Staying up is bad _____ you , but getting up early is good _____ your health.
When you are confused about some words in reading, you can ______ the dictionary.
It is no use ______ a lot without doing anything.
______by many people,the spokesman made an exciting speech.
At the same time,they are taking strong _______ to protect wildlife resources.
To enjoy the scenery,he would rather _____ long hours on the train ___ travel by air.