第24题: [单项选择]The United States entered the war against Japan ______. A. because Japan declared war B. because Japan was an ally of Germany C. after Japan launched the Pearl Harbor attack D. after peaceful efforts had failed 参考答案:C 答案解析:[解析] 最后一段倒数第二句“In December， 1941，Japan launched the unprovoked attack on the United States at Pearl
第25题: [填空题]以下循环的执行次数是 【9】 。
k=0
Do Until k＞=10
k=k+1
Loop 参考答案:J 答案解析:[评析] k从0开始每次加1，当k条件为10时，将不在进入循环，故整个循环执行了10次。
