It takes ____________ of six months for a new type of computers to be produced.1.the amount 2.an amount 3.average 4.an average

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It takes ____________ of six months for a new type of computers to be produced.1.the amount 2.an amount 3.average 4.an average
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It takes ____________ of six months for a new type of computers to be produced.1.the amount 2.an amount 3.average 4.an average
It takes ____________ of six months for a new type of computers to be produced.
1.the amount
2.an amount
3.average
4.an average

It takes ____________ of six months for a new type of computers to be produced.1.the amount 2.an amount 3.average 4.an average
4.an average
翻译: 生产一种新型的电脑平均需要6个月的时间.

4.an average

选4~
首先排除1和3,泛指不能用the,也不可不加冠词
2是大量的意思 不合适
所以选4