【题目】The guide told them not to eat the mushroom, ______ that there was a risk of food poisoning.
A. explainedB. explainingC. to explainD. having explained
在线课程【答案】B
【解析】
考查非谓语动词。句意：导游告诉他们不要吃蘑菇，并解释说有食物中毒的危险。本句已经存在谓语动词，且句中没有连词，故explain只能作非谓语动词，与逻辑主语构成主谓关系，用现在分词，作伴随状语。故选B。