精选优质文档-倾情为你奉上延续性动词与非延续性动词用法专练 I. 单项选择。1. The factory _ since the February of 1988. A . has been open B. has opened C. was open D. opened2. Mary and Rose _ friends since they met in 2000. A. have made B. have been C. made D. have become3. You mustnt _ until he comes back. A. be away B. leave C. be left D. left4. Miss Gao _ this school for nearly 5 years. A. has been in B. has come t
