1 . 选择填空:while, but, however
1. I would like to help you._________ , I don’t know how to operate the computer.
2. They rushed to the airport,_________ they were too late.
3. Their country has plenty of oil,_________ ours has none.
1. I would like to help you.
2. They rushed to the airport,
3. Their country has plenty of oil,
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