Помогите вставить тут прошедшие времена :

1.Because Jasper (make) an appointment with his dentist beforehand he (hope) he wouldn't have to wait long , although there (be) a lot of people in the waiting room when he (arrive).
2. By the time Bill (leave) school , he (speak)good French and German . When he (be) at the university he (learn) Italian and Spanish.
3. Yesterday Jenny (send) me a very apologetic letter explaining why she (not/do) what she (promise ).
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