He has been_____(观测)the stars all her life
问题描述:
He has been_____(观测)the stars all her life
答
observing
祝你学习进步,更上一层楼,快乐每一天!(*^__^*)
答
observing
have 、has been doing 现在完成进行时态
表示从过去开始一直到现在并有可能继续下去