The policeman kept his eyes____on the screen of the computer to identify the criminal'sfootprints.A.fixed B.fixing C.being fixed D.to fix为什么选A呢?

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The policeman kept his eyes____on the screen of the computer to identify the criminal'sfootprints.A.fixed B.fixing C.being fixed D.to fix为什么选A呢?

The policeman kept his eyes____on the screen of the computer to identify the criminal'sfootprints.A.fixed B.fixing C.being fixed D.to fix为什么选A呢?
The policeman kept his eyes____on the screen of the computer to identify the criminal's
footprints.A.fixed B.fixing C.being fixed D.to fix为什么选A呢?

The policeman kept his eyes____on the screen of the computer to identify the criminal'sfootprints.A.fixed B.fixing C.being fixed D.to fix为什么选A呢?
A;有这样一个短语;fix one's eyes on sth.如改成被动就是one's eyes are/were fixed on sth
在这题中keep one's eyes fixed on sth就是这词组的变形,过去分词表被动!
相信你能理解和赞同!

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