Read the following sentences and underline the nouns. Write C above each concrete noun and A above each abstract noun.

1. Already his (legs)(C) were cramped, his (thigh)(C?)(muscles)(C) tired; his (knees)(C) hurt, his (feet)(C) felt numb and his (hands)(C) were stiff.

2. In the inside (pocket)(C) of his (jacket)(C) he found a little (sheaf)(C) of (papers)(C), and he pulled one out and looked at it in the (light)(C or A?) from the living (room)(C).

All of those nouns are concrete.

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1. Already his legs (C) were cramped, his thigh (C), muscles (C) tired; his knees (C) hurt, his feet (C) felt numb and his hands (C) were stiff.

2. In the inside pocket (C) of his jacket (C) he found a little sheaf (C) of papers (C), and he pulled one out and looked at it in the light (A) from the living room (C).

To identify the nouns in each sentence and determine if they are concrete or abstract, follow these steps:

1. Sentence 1:
- Already his (legs)(C) were cramped, his (thigh)(C) muscles tired; his (knees)(C) hurt, his (feet)(C) felt numb and his (hands)(C) were stiff.

2. Sentence 2:
- In the inside (pocket)(C) of his (jacket)(C) he found a little (sheaf)(C) of (papers)(C), and he pulled one out and looked at it in the (light)(C or A?) from the living (room)(C).

Explanation:

1. In sentence 1, the nouns are:
- legs (C)
- thigh (C)
- muscles (C)
- knees (C)
- feet (C)
- hands (C)

All the nouns in sentence 1 are concrete nouns since they represent tangible objects or things that can be physically experienced or perceived.

2. In sentence 2, the nouns are:
- pocket(C)
- jacket(C)
- sheaf(C)
- papers(C)
- light(C or A?)
- room(C)

Most of the nouns in sentence 2 are concrete nouns except for "light." The classification of "light" as a concrete or abstract noun depends on the intended meaning. If it refers to the physical illumination, it can be considered a concrete noun. If it signifies understanding or knowledge, it would be an abstract noun.

Please note that the question mark placed next to "thigh" indicates uncertainty in the classification as it could be both concrete or abstract depending on context.