surprised all of us.
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( 刘翔退赛 ) surprised all of us. （drop; race）
试题答案
That Liu Xiang dropped out of the race/ Liu Xiang’s dropping out of the race
( 刘翔退赛 ) surprised all of us. （drop; race）
That Liu Xiang dropped out of the race/ Liu Xiang’s dropping out of the race