10 Complete the dialogue with was, wasn't, were, weren't.

Solution:

This is an exercise to practice the past simple of the verb 'to be' (was, wasn't, were, weren't). We need to choose the correct form based on the subject (singular/plural) and whether the sentence is affirmative or negative.

• 1. Who ... Pierre and Marie Curie? The subject is 'Pierre and Marie Curie', which is plural. The question is affirmative. So, we use 'were'.
• 2. They ... scientists. The subject is 'They', which is plural. The statement is affirmative. So, we use 'were'.
• 3. ... they American? The subject is 'they', which is plural. The question is affirmative. So, we use 'were'.
• 4. No. He ... French. She ... Polish. For 'He' (singular, affirmative), we use 'was'. For 'She' (singular, affirmative), we use 'was'.
• 5. Was she born in France? The subject is 'she' (singular, affirmative question). So, we use 'was'.
• 6. No, she ... . She ... born in Poland. For 'she' (singular, negative), we use 'wasn't'. For 'She' (singular, affirmative), we use 'was'.

Answer:

1. A Who were Pierre and Marie Curie?
2. B They were scientists.
3. A Were they American?
4. B No. He was French. She was Polish.
5. A Was she born in France?
6. B No, she wasn't. She was born in Poland.