1.A lot of emails --(send) every day

1.A lot of emails __(send) every day2.A lot of emails __(send) the day after tomorrow3A lot of emails __(send) now4 A lot of emails __(send) this time yesterday5 A lot of emails __(send) since last month6 A lot of emails __(send) by the end of last month怎么填?这种题怎么都不会还有道7 Our grandfather said a lot of emails___(send) the next day