Cách làm cho bạn:
1. wasn't 4. was
2. wasn't 5. were - weren't
3. was
EX3: Complete the sentences with was, were, wasn't and weren't. (Hoàn thành các câu với was, were, wasn't và weren't.)
1. wasn't 4. was
2. wasn't 5. were - weren't
3. was
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