英语语法soon a big crowd gathered.To make himself-,the speaker c

seen是过去分词,表示被动啊。题目意思是：为了让别人看到自己(即“为了让自己被别人看到”),发言者爬到了椅子上。To make himself seen (by others),。。。=To make others see him,。。。再如：The teacher speaks loudly to (make herself heard by the students of the back row)。括号里=make the students of the back row hear her。为了让后排的学生听到,老师说话声音很大。希望对你有用,不懂追问!