1．Until the noise of the bus ________， we were able to hear the program again.
A．died from B．died out
C．died away D．died off
答案与解析：C 句意：直到公共汽车的噪音逐渐消失，我们才又能够听到节目。die away“(声音、光线等)逐渐减弱，渐渐消失”；die out“消失，灭绝”；die off“相继死去”；die from“死于”。依据句意可知，该处说的是声音的消失，选C项。
2．I'd appreciate ________ if you would like to teach me how to use the computer.
A．that B．it
C．this D．you
答案与解析：B 句意：如果您愿意教我如何使用电脑，我将不胜感激。appreciate后面不能跟人作宾语，这里用it来指if从句中提到的情况。能用在此结构中的常见动词有like, love, appreciate, hate等。
