问题
选择题
Many people say they have seen Unidentified Flying Objects, which, they believe, ________alien
spaceships.[ ]
A. are
B. is
C. have
D. has
答案
答案：A
搜题请搜索小程序“爱下问搜题”
Many people say they have seen Unidentified Flying Objects, which, they believe, ________alien
spaceships.[ ]
A. are
B. is
C. have
D. has
答案：A