单项选择题 Of all the soldiers they had the（）of being the fiercest, the most patriotic, the toughest.

单项选择题 The socks were too small, and it was only by（）them that he managed to get them on.

单项选择题 As we know, blood types A and B cannot receive AB, but AB may receive A or B. Type O can give to any other group; hence it is often called the（） donor.