People have lots of problems living in the central Australian desert, ____ the lack of water is the most serious one.
【原创】Mr. Zhang gave all textbooks to all the pupils, except___________ who had already taken tem.
【原创】Besides Tom, ________ Crosettes have two other sons, __________ of whom are all interested in making model planes.
【原创】Nobody noticed the thief slip into the house because the lights happened to__________.
【原创】I don't remember___________ to the airport that year.
【原创】A man does not know the difficulty of anything_________ he does it personally.