His father has been working hard for many years to support him at university so he did not
A. let him out
B. let him in
C. let him down
D. let him away
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确定期货合约交易单位的大小，主要应当考虑合约标的的市场规模、交易者的资金规模、期货交易所会员结构以及该商品现货交易习惯等因素。()
A. 正确
B. 错误
【B12】
A. direct
B. helpful
C. usual
D. particular
The success of expanding foreign markets has influenced the domestic cultural environment
A. Y
B. N
C. NG
Which of the following statefnents about Humphrey is true？
A. He is now still an IBM employer.
B. He has worked for IBM for 37 years.
C. India honors him highly.
D. The US pays much attention to his quality advice.
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