摘要： He was feeling bad. He went to work, , and tried to fix his attention on it. A. however B. so C. although D. while
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He was feeling bad. He went to work, _______, and tried to fix his attention on it.
A. however B. so C. although D. while
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He was feeling bad. He went to work, _______, and tried to fix his attention on it.
| A．however | B．so | C．although | D．while |