What's this?It's ( ) UFO.A.a B.an C.the

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What's this?It's ( ) UFO.A.a B.an C.the
What's this?It's ( ) UFO.A.a B.an C.the

What's this?It's ( ) UFO.A.a B.an C.the
应选A 此题应该按照U的国际音标来分析为|ju|所以选A