Question

6. The old photo brought back the grey-haired teacher's memory of                his first students. (fun) 

那张老照片让白发老师回忆起他教第一届学生时所享有的快乐。

Answer 1

6. the fun he had (in) teaching考查fun和定语从句的用法。have fun (in) doing sth.做某事开心。类似结构的名词还有have trouble / difficulty / a problem / luck / good time / hard time / a job (in) doing sth.; be busy / engaged / employed / occupied (in) doing sth.;take delight / pleasure (in) doing sth.;spend time (in) doing sth.等。"快乐(fbn)"在句中作宾语，"教第一届学生时所享有的"是定语，故用定语从句。