87. ________________________ ，doctors can treat this disease successfully.
88. In my sixties, one change I notice is that ________________________ .
89. Because of the leg injury, the athlete ________________________ .
90. To make donations or for more information, please ________________________ .
91. Please come here at ten tomorrow morning ________________________ .
参考答案：
87. Thanks to a series of new inventions
88. I am more inclined to get tired than before
89. decided to quit the match
90. contact us at the following address
91. if it is convenient for you / at your convenience
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