YOU SAID:
They should arrive by 10:00.
INTO JAPANESE
彼らは10:00までに到着するはずです。
BACK INTO ENGLISH
They should arrive by 10:00.
INTO JAPANESE
彼らは10:00までに到着するはずです。
BACK INTO ENGLISH
They should arrive by 10:00.
Come on, you can do better than that.