Your keys ____ in the car yesterday.
- A. were(correct answer)
- B. was
- C. are
- D. be
Why: Keys are more than one, and yesterday is past. Use were.
A212 questions · Elementary · Sentence Foundations
Practise was and were with short multiple-choice questions: which form goes with which subject, wasn't and weren't, questions and short answers, and phrases like last night and two days ago. Each answer comes with a one-line reason.

1.Your keys ____ in the car yesterday.
Why: Keys are more than one, and yesterday is past. Use were.
2.____ the hotel near the beach? — Yes, it was.
Why: One hotel, in the past: Was goes first. The answer "Yes, it was" matches it.
3.I ____ at school yesterday because I was ill.
Why: Use was with I. The negative is wasn't. No did with be.
When to use was and when to use were, negatives with wasn't and weren't, questions, short answers and the time phrases that go with the past.