----- Nội dung dịch tự động từ ảnh -----
10. A bald eagle..
A. can distinguish
C. could distinguish
11. When you are on duty, your uniform
A. must be worn
..from the other large birds by its white head and white tail.
B. can be distinguished
D. could be distinguished
.at all times
.
B. must wear C. must have worn
D. must have been worn