求一道首字母填空~Liu Xiang withdrew from the Olympic Games in 2008.After an operation he returned to training in July.Lix and his coach both hoped the Shanghai Golden Grand Prix would help him i
网友回答
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