They have () to China many time,They know a lot about China(要理由)

问题描述:

They have () to China many time,They know a lot about China(要理由)
They have () to China many time,They know a lot about China
A.come B.came C.go D.went

They have (A.come) to China many time.They know a lot about China.
他们已经来过中国多次了.他们对中国很了解.
前句的时态是现在完成时,结构是助动词have加上动词的过去分词组成,表示到现在已经做过了.come的过去分词写法是不规则的,和原形写法一样.