【题目】_________ his conclusion on the evidence he collected on the scene, he proved that the murderer was guilty.
A. BasedB. Basing
C. To baseD. Being based
在线课程【答案】B
【解析】
考查非谓语动词。句意：根据他在现场收集的证据，他得出了结论，证明凶手是有罪的。本句已经存在谓语动词且句中没有连词，故base只能做非谓语动词与逻辑主语he构成主谓关系，故用现在分词basing。故选B。