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49、The Neutrality Act of 1939
A.permitted the selling of arms to belligerent nations
B.antagonized Japan
C.permitted the British to trade only with the Allies
D.led to the Lend-Lease Act
50、The United States entered the war against Germany
A.because Germany declared war
B.because Japan was an ally of Germany
C.after Germany had signed the Nazi-Soviet Pact
D.after peaceful efforts had failed
51、根据下列材料，请回答51-56题
We once had a poster competition in our fifth grade art class.
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