71．while I was ill/sick 78．too young to
72．could/can have moved 79．(on) equipping the/their school with
73．that I began注意：spend time on sth
74．(he was) asked about the secret spend time (in) doing sth
75．interesting is the book spend money on sth
76．What we are born with spend money (on) doing sth
77．for which he paid 80．had left
略