Choose the correct sentences. we stayed in a campsite near the lake, where we could set up our tents and enjoy fishing and hiking. the teacher was aware about the students' difficulties with the new subject and changed the lesson plan. the boiling weather made it difficult to stay outside for a long time, i couldn't wait get back to warmth of my hotel room. before the exam, she felt nervous had to take a few deep breaths to calm down. they say he's lazy because he spends too much time watching tv rather than working.

To choose the correct sentences from the provided options, we need to identify the grammatically correct sentences. Let's analyze each sentence: 1. "we stayed in a campsite near the lake, where we could set up our tents and enjoy fishing and hiking." - This sentence is correct. It is structured properly and conveys a clear message. 2. "the teacher was aware about the students' difficulties with the new subject and changed the lesson plan." - The correct form should be "the teacher was aware OF the students' difficulties," so this sentence is incorrect due to the preposition usage. 3. "the boiling weather made it difficult to stay outside for a long time, i couldn't wait get back to warmth of my hotel room." - This sentence has a punctuation error followed by "i" instead of "I." Additionally, it should be "couldn't wait TO get back." Therefore, this sentence is incorrect. 4. "before the exam, she felt nervous had to take a few deep breaths to calm down." - This sentence is missing a conjunction after "nervous." It should be "before the exam, she felt nervous AND had to take a few deep breaths to calm down." Therefore, this sentence is incorrect. 5. "they say he's lazy because he spends too much time watching tv rather than working." - This sentence is correct. It is grammatically accurate and conveys the intended message effectively. Therefore, the correct sentences are: 1. "we stayed in a campsite near the lake, where we could set up our tents and enjoy fishing and hiking." 2. "they say he's lazy because he spends too much time watching tv rather than working." These sentences are grammatically correct and convey their messages clearly.