31. A. employed B. invited C. told D. informed
解题思路：Autumn Congress 与guest lecturer有关的动词是 ？
32. A. offered B. arrived C. intended D. attempted
解题思路：intended 与attempted近义，应排除，承诺去接。
33. A. therefore B. however C. instead D. as well
解题思路：转折特点：一句肯定，一句否定；前后句有一组反义词；前句是形副词原级，后句是比较级；前句是一般过去式，后句是一般现在时或前句是过去完成时，后句是一般过去式；后句有一”still”词；前句有“Maybe”, “Perhaps”, “It meight be”等表示“可能”的副词。
34. A. luckily B. really C. partly D. separately
