问题
选择题
_____ their final medical check, the astronauts boarded their spacecraft. [ ]
A. Received
B. Being received
C. To receive
D. Having received
答案
答案：D
搜题请搜索小程序“爱下问搜题”
_____ their final medical check, the astronauts boarded their spacecraft. [ ]
A. Received
B. Being received
C. To receive
D. Having received
答案：D