some old teachers will be invited to our class meeting

our class has any students

c nha

0 he has not played football since last year

1 our mother last went shopping in november

2 they have talked to each other for 2 months

3 ??

4 she has never eaten this kind of food before

5 the last time we took photographs was years ago

6 mr Johnson has taught the stress children for a long time

7 Chau started to keep a dirty  when  she was10

how is lauguage learnt(by people)?

1. i was having breakfast when the mailman arrived

2 while everyone was sleeping, Paul was waching tv

3 i was dreaming about a long  vacation when the alarm clock went off

4 while i was practicing the piano late last night, i heard a strange noise

5 the sheep were grazing in the filed when they were scared by the noise

6 what were you doing when the earthquake happened yesterday

có j sai mn chỉ mik nha

sao câu 3 lại là produced mà ko phải là are produced ạ?