2.wasn’t; Was; was, wasn’t; Where was

4. Tom always plays basketball with his classmates on Sundays.

3. Lily is a hard-working student, but in fact, she doesn’t like math.

2. My teacher is an American, but he speaks good Chinese.

12.costed→cost

11.were→was

10.were→did

9. was feel→felt

8. weren’t→didn’t

7. planed→planned