“世界上没有不可认识的事物，只有尚未被认识的事物。”这种观点属于（ ）
A．怀疑论
B．可知论
C．不可知论
D．唯心主义
B
The simple joy of reading is something we take for granted. But many people have had to _____ this pleasure because of poor eyesight.
A．give in
B．give off
C．give out
D．give up
