Mr. Zhang gave all textbooks to all the pupils, except___________ who had already taken tem.

Teaching is ________ everybody can do; it requires patience as well as professional training.

People think that the beauty of the mountains is great than ___________ of the desert.

The editor asked me to write another article for them, _____about environmental protection.

 Space exploration is something that China has done to create jobs in a high-tech industry, to show “______ don't just make cheap clothes”.