寫多益模擬測驗時寫到一題：
If students are unable to arrive___the date specified on their visa documents
,they will be sent homr and will have to rrstart the application process.
選項有：in from. between by
答案是by
想請問arrive by是固定用法嗎？都只看到arrive at/in的討論，還是說這題只是單純問b
y可當時間介詞？
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