Question

kate sent me a christmas card in 1978. ( A)dindn't (B)don't (C)hadn't (D)hasn't (E)won't

Answer 1

Alternativa A, porque ao formar uma oração negativa no Simple Past usa-se did not, ficando assim:
Kate didn't send me a Christmas card in 1978.
:)

Answer 2

KATE SENT ME CHRISTMAS CARD IN 1978
KATE DIDN'T SEND ME A CHRISTMAS CARD IN 1978