A recent national study of the public schools shows that there are now one microcomputer for every thirty-two puplis,four times as many than there were four years ago.
答案是 there is now one microcomputer for every thirty-two pupils,four times as many as there were.
NN们帮忙解释下为什么最后是there were呢,按照平对称原则也应该是there was啊~~
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