问题
选择题
Tiring as it might be, the military training ______ the best opportunity to make lifelong friends.
A．is believed to be
B．believes as
C．is believed to being
D．believes
答案
答案：A
句型考查题。Sth be believed to do… “据认为…”句意：虽然累然而军训被认为是结交终身朋友的好机会。