求一道首字母填空~Liu Xiang withdrew from the Olympic Games

问题补充：

求一道首字母填空~Liu Xiang withdrew from the Olympic Games in .After an operation he returned to training in July.Lix and his coach both hoped the Shanghai Golden Grand Prix would help him i

答案：

填improve,意为“改善”,楼上是错的,不用ing形式,help sb do sth

补充：help sb do sth=help sb to do sth

（不过常用的是原型）

======以下答案可供参考======

供参考答案1:

improve用ing形式。

供参考答案2:

inprove

供参考答案3:

improving