1. I’m sorry ______ so long. I forgot to tell you in advance where I had been.
A. to keep you wait
B. to keep you waiting
C. to keep you waited
D. to have kept you waiting
 
2. We’re in an era when computer hackers are stealing credit-card numbers and nasty animal-borne viruses are ______ national borders.
A. transplanting
B. transgressing
C. transforming
D. transmitting




  1.D
【句意】我抱歉让你等了这么久。我忘记提前告诉你我在哪里了。
【解析】语法题——完成时态。由句中关键词“I forgot to tell you in advance where I had been我忘记提前告诉你我在哪里了”的对应知“你等了这么久”这个事情发生在过去的过去，故这里应该用完成时态，由此知D项“to have kept you waiting”正确。
 
2.B
【句意】我们处于这样的时代：计算机黑客正偷盗信用卡号码，以及严重的动物源病毒正越过国家边界。
【解析】动词辨析题。transplant“移植；迁移；使移居”；transgress“违背（道德）；违犯（法律）；逾越/越过（土地区域）”；transform“改变，使……变形；转换”；transmit“传染；输送；传（热/光）”。由关键词“national borders国家的边界”的对应知“越过”符合，由此知B项正确。