选D
fun 抽象名词,前面可不用限定词,altitude可数名词,不能单独出现,因为其以元音开头,用an
It's __great fun to start the trip at ____altitude of more than 5000meters
It's __great fun to start the trip at ____altitude of more than 5000meters
A.a;an B.a;the C.the;an D./;an
A.a;an B.a;the C.the;an D./;an
英语人气:297 ℃时间:2020-03-26 23:01:26
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