HOW WILL you know if the person next to you on a bus, aeroplane or checkout line is infectious with covid-19?
checkout line前用at才符合习惯吧。
谢谢各位大咖专家老师!
at/in/on a checkout line 的用法都对,所以我看行。
国外媒体例句:
1. There Are Angels At The Checkout Line
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