میشه جواب بدید?لطفا واضح بنویسید.ممنون🌹

15 He often helps her mother on thursdays. 16 was/didnt go/stayed/watched/called/talked. 17 she participated in an on line course last week. 18 where does sara buy stamps? 19 mehrdad usually writes stories. 20 they didnt attend the tv program. 21 my friend were absent yesterday. همه جوابا رو براتون نوشتم فقط سوال ۱۶ به ترتیب جای خالیاس. موفق باشید