汉代的疆土得以拓展,与汉和西方政权将丝绸之路对接起来有关。
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The Japanese, ________ average, live much longer than the Europeans.
They believe that nerves _______ the left side of the brain develop faster in girls than _______ boys.
The old lady has been living _____ her own for ten years now.
The boy has to finish his homework instead ______ going out.