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【单选题】
阅读下列算法，回答：Startofthealgorithm(算法开始)(1)输入N的值。(2)设i的值为1。(3)如果i<=N，则执行第(4)步，否则转到第(7)步执行。(4)计算sum+i，并将结果赋给sum。(5)计算i+1，并将结果赋给i。(6)返回到第3步继续执行。(7)输出sum的结果。Endofthealgorithm(算法结束)上述算法（ ）。A.
能够正确地计算 sum=1+2+3+4+ … +N 。
B.
不能正确地计算 sum=1+2+3+4+ … +N 。
C.
0
D.
0
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举一反三
【单选题】This is our new English teacher, Miss Evans. She _____ many European countries. [ ]
A.
has gone to
B.
has been in
C.
has gone in
D.
has been to
【单选题】---Where is our English teacher? ---She_____ London.
A.
went to
B.
has went to
C.
has gone to
D.
has been to
【单选题】-Is the man over there your English teacher ? --No, it ______ be him. He has gone to Canada to study further.
A.
mustn't
B.
can't
C.
won't
D.
needn't
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