He China since he to China.A learned , came B has learned , comesC have learned , came

发布时间：2020-08-23 10:44:23

He     China since he      to China.
A learned , came                       B has learned , es
C have learned , came                  D has learned ,came

网友回答

解析：句意：自从他来到中国以后，他就了解了中国。结合语境可知本句主句描述的是现在已经完成的动作，故用现在完成时态。从句中描述的是过去某时发生的动作，故用一般过去时态。选D。
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