He is a man of great ability. I am sure that a lot will be _________if he is elected chairman of the student union.
A. finished
B. completed
C. accomplished
D. conquered
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The whole journey was a _________; we lost our luggage and we arrived two days late.
A. dream
B. daydream
C. nightmare
D. nightdream
He gave up his seat on the bus to an old woman standing _________.
A. from
B. close
C. upon
D. nearby
Everyone learns best from his own _________.
A. experience
B. experienced
C. inexperience
D. inexperienced
2 包含趋势性、季节性或周期性的序列称为 ( )。
A. 平稳序列
B. 周期性序列
C. 季节性序列
D. 非平稳序列