C Put the verbs in brackets into the Past Perfect or the Past Perfect Continuous. 16. “Lisa was exhausted yesterday.” – “I know. She (study) for a history exam all day.”

17. “Why was Mr. Smith angry with Pam?” – “Because she (not/ finish) her work.

18. How long (you/study) French before you first visited France?

19. They (live) in Spain before they moved to Greece.

20. (she/ finish) making the lunch when the guests arrived?

16. "Lisa was exhausted yesterday." – "I know. She had been studying for a history exam all day."

In this sentence, we use the Past Perfect Continuous (had been studying) because we are talking about an action that started in the past (before yesterday) and continued up until a specific point in the past (yesterday). It emphasizes the duration of the action.

17. "Why was Mr. Smith angry with Pam?" – "Because she had not finished her work."

Here, we use the Past Perfect (had not finished) because we are talking about an action (not finishing her work) that was completed before another past action (Mr. Smith being angry). The Past Perfect shows that the action of not finishing the work happened before the anger.

18. "How long had you been studying French before you first visited France?"

We use the Past Perfect Continuous (had been studying) here to indicate the duration of studying French. The action started in the past (before the first visit to France) and continued up until a specific point in the past.

19. "They had lived in Spain before they moved to Greece."

In this sentence, we use the Past Perfect (had lived) because we are talking about an action (living in Spain) that was completed before another past action (moving to Greece). The Past Perfect shows that the action of living in Spain happened before the action of moving to Greece.

20. "Had she finished making the lunch when the guests arrived?"

Here, we use the Past Perfect (had she finished) to talk about an action (finishing making the lunch) that was completed before another past action (the guests arriving). The Past Perfect shows that the action of finishing making the lunch happened before the action of the guests arriving.