单项选择题

A. Buy a book.
B. Meet him tomorrow.
C. Go to Beijing.
D. Book a ticket.
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填空题
Paper, like many other things that we use today, was first made in (11) . In Egypt and the West, paper was not very commonly used before the year (12) . The Egyptians wrote on a kind of material made of a water (13) Europeans used parchment for many hundreds of years. Parchment was very strong; it was (14) the skin of certain young animals. We have learnt of the most important facts of European history from (15) that were kept on parchment.
单项选择题
______ a teacher in a university, it is necessary to have at least a Master’s degree.
A. To become B. Become
C. One becomes D. On becoming
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