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【单选题】
We write to each other, but we sending e-mails on the Internet now. [ ]A.
used to; are used to
B.
are used to; used to
C.
were used to; are used to
D.
used to; used to
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举一反三
【单选题】The main idea of the business school academic is appealing. In a world where companies must adapt to new technologies and source of competition, it is much harder than it used to be to offer good empl...
A.
had job security and opportunity of promotion
B.
had to compete with each other to keep his job
C.
had to undergo training all the time
D.
had no difficulty climbing the corporate ladder
【判断题】电气工具和用具应由专人保管，每六个月须由电气试验单位进行定期检查;使用前必须检查电线是否完好，有无接地线;坏的或绝缘不良的不准使用;使用时应按有关规定接好漏电保护器和接地线;使用中发生故障，须立即找电工修理。
A.
正确
B.
错误
【单选题】－Is it your boss in the office? －No, it _____ be him. He has gone to Beijing on business. [ ]
A.
mustn't
B.
shouldn't
C.
can't
D.
needn't
【简答题】使用电钻等电气工具时须（）。电气工具和用具应由专人保管，每（）个月须由电气试验单位进行定期检查。
【单选题】What is suggested about Business World Monthly?
A.
It pays its writers on a monthly basis.
B.
It holds an annual book fair for its readers.
C.
It has published several reviews written by Mr. Johnson.
D.
Its subscribers increased from the beginning of January.
【单选题】采集的卵母细胞，都要体外经人工培养成熟后，才能与获能的精子授精，以下原因不正确的是（）
A.
卵子从输卵管中冲出也要经历类似精子获能的过程
B.
动物排出的卵子成熟程度不同
C.
体外人工培养至减数第二次分裂中期时，才算成熟
D.
冲出的卵子还需要培养一段时间由小变大
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