Sally helped her mum about the house. —
нужно подобрать отрицательную форму

does manager look through the mail every morning?

the manager does not look through the mail every morning.

to speak english (7-a)

to enjoy holidays (6-b)

to stay in britain (1-c)

to see you again (5-g)

to miss friends (2-d)

to get an invitation ( 4-e)

to teach girls an boys (3-f)