6. Mary didn't … her face in the morning. a) wash; b) washing; c) washed; d) washes.

Question

6. Mary didn't … her face in the morning.
a) wash;
b) washing;
c) washed;
d) washes.

Answer 1

Wash ....................................

Answer 2

Wash.
Так как присутствует DID (прошедшее время) то ничего добавлять не надо.
Само DID указывает на время.