A.To | B.For | C.In | D.At |
A.by the hour | B.by an hour | C.by hour | D.each hour |
A.editor-in-chiefs | B.by an hour |
C.by hour | D.each hour |
A.on, off | B.to, along | C.in, off | D.on, along |
A.on condition | B.on condition that | C.on this condition | D.on condition if |
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