He is very old, ______ he still works very hard.A．butB．ifC．whenD．as
题型：不详难度：来源：
| He is very old, ______ he still works very hard. |
答案
| A |
解析
试题分析：考查连词：A. but 但是，B. if 如果，C. when当…时候，D. as正如，因为，随着，句意：他老了，但是还是工作很努力。两句话是转折关系，选A。 |
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