— What you at 9:00 yesterday? — I some food. A. did; do; eat B. are; doing; ate C. were; doing; was eating
---He’s never been to an aquarium. ---_______.
Would you mind ______ those old jeans?
I have been skating _______ nine o’clock.
He _____ when the UFO arrived.
The teacher said that they ______ hard-working students.