Вставьте ответ. Объясните свой выбор(объяснение обязательно)

How often…?

a) is the beach cleaned

b) is cleaned the beach

c) the beach is cleaned

d) the beach cleaned

ответ d), по правилу.

(как часто пляж убираеться)

1how   is your mum? she's fine,thanks.2how are your parents? they're ok.3how are you? i'm very well,thanks you.4how is your uncle? he's fine,thanks.5how are your children? they're  ok.6how is liz? she's  fine,thanks.7how is your cousin? she's/he's  very well,thank you  .

is he good at math?

was she there last year?

were they hungry when they arrived?

are you nice to work with?

is it pleasant to deal with him?

is this book hard to get?