WhendidtheGreenscome的精选

问题详情：选择填空从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。—WhendidtheGreenscometoChina?—They_____Chinaforsevenyears.cometo    beento      comein   beenin【回答】D知识点：动词时...