题文
Stefan ________ from heart attack for more than ten years, but now he’s healthy and energetic.
| A.had suffered | B.suffered |
| C.has suffered | D.has been suffering |
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Stefan ________ from heart attack for more than ten years, but now he’s healthy and energetic.
| A.had suffered | B.suffered |
| C.has suffered | D.has been suffering |
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