朋友,这是答案：
His computer (was broken) down,so it needed (repairing).
前面应该用被动语态,从后面的needed提示这个句子的时态为一般过去时态,
所以前面应该用was broken.
另外,后面的need一般跟to be done或者doing,区别在于：
need to be done一般要有by引出动作的发出者；
need doing跟need to be done意思一样,但是不必引出动作的发出者.
你明白了吗?
His computer _____(break) down,so it needed __________(repai
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