Have you forgotten __________$1000 from me last month? Will you please remember ________ it tomorrow?
A. borrowing; to bring B. to borrow; bring
C. borrowed; bringing D. borrowing; bringing
It was only when I read this story for a second time ________to appreciate its beauty.
A. then I began B. that I began
C. did I begin D. had I begun
The lawyer was so kind that he devoted all his spare time he had _________ the disabled.
A. to helping B. helped
C. helping D. to help
Though the series of books is a bit too dear (昂贵), it is worthwhile _____________.
A. to be bought B. buying
C. to buy D. buying it
He is the only one of the students who _____ a winner of scholarship five times up to now.
A. is B. are
C. have been D. has been
目前．地球面临水资源危饥。《21世纪报》学生版针对此情况面向全体中学生征稿，呼吁人们重视目前的问题，并保护水资源，征稿题目是：Global Shortage of Fresh Water请根据以下提示写一篇100词左右的短文，向《21世纪报》投稿。
稿件要点：1．人们认为淡水是取之不尽的，而实际不是；
2.淡水资源危机的原因；
3.人们应该采取的措施。
Global Shortage of Fresh Water
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