解析：in search of 寻找。

　　答案：in

　　3．Tom succeeded ________ (win) a gold medal in the Olympic Games.

　　解析：succeed in doing sth. 成功做某事。

　　答案：in winning

　　4．He was the first engineer ________ (design) such a bridge.

　　解析：序数词后用不定式形式作定语。

　　答案：to design

　　5．The reason ________ he refused my invitation was that he was too busy to spare any time.

　　解析：先行词为 reason，定语从句中缺状语，故用 why 引导。

　　答案：why

　　 6.He persuaded me ________ (go) sailing with him.

　　解析：persuade sb. to do sth. 说服某人做某事。

　　答案：to go

　　7．He got ________ trouble for breaking the traffic rule.

　　解析：get into trouble 陷入困境。

　　答案：into

　　8．There are several women ________ (chat) in the shade.

　　解析：women 与 chat 之间为主动关系，故用现在分词作定语。

答案：chatting