问题
选择题
| The mobile phone was _____ for at least five years against the bug, but it was wrong only one year later. |
A. ensured B. guaranteed C. protected D. promised |
答案
答案：B
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| The mobile phone was _____ for at least five years against the bug, but it was wrong only one year later. |
A. ensured B. guaranteed C. protected D. promised |
答案：B