PartIVTranslation
Asthesourceofaluminumisalmostinexhaustible,wecanexpectthatmoreandmoreuseswillbefoundforthisversatilemetal.(PassageTwo)
由于铝的资源几乎是无止境的，我们可预计对这种多用途的金属将会发挥越来越多的用途。
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Part IV Translation
It would have been difficult for them to avoid the conclusion that the horse and mule population would decline rapidly. (Passage Four)
Yesterday was such a ____ day we decided to go for a drive.
This is the military ____. Nobody is allowed to get in without permission.