We entered the war against Germany_______.
because Germany declared war.
because Japan was an ally of Germany.
after Germany had signed the Nazi-soviet Pact.
after peaceful efforts had failed.
答案及解析:本题考查细节。A选项,因为德国宣战。这在第一段已有说明。尽管希特勒坏事做尽,美国还是倾向于中立政策。第二段罗斯福在芝加哥的演讲,态度稍有改变。严厉批评希特勒的政策,但仍然以中立为主。1941年日本袭击珍珠港,不久德国宣战,美国才不得不参战。综上,A选项正确。故正确选项为A。



