问题补充:
Working hard is not only a of great success, but it is among the essential requirement.
A. sign
B. singal
C. guarantee
D. expectation
答案:
A. sign
B. singal
(答案→)C. guarantee
D. expectation
解析:句意:勤奋工作不仅仅是巨大成功的保证,它还是基本要求之一。A. sign符号、标志;B. singal 信号;C. guarantee保证;D. expectation期待。由句意可知选C。
考点: 考查名词的用法。
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