问题
选择题
We should unite, for no country _____can solve the problem of the pig flu.
A．alone；for
B．lonely; because
C．only; since
D．simply; as
答案
答案：A
考查副词和表示原因的连词的辨析。句意：没有任何一个国家独自可以解决猪流感问题。Alone adj.独自，单独；for补充说明原因符合句子。