Four parts have been underlined and lettered A, B, C, and D. One contains an error. 

1.(A) It is generally realized that patriotism is "(B) a must" for every citizen. (C) As a result, it is everybody’s duty (D) to defend our country.

2. A few men pulled the tree (A) with a ten-feet rope. They were (B) not strong enough (C) to pull it down at once, so they (D) sat down for a short rest.

3. (A) I went downtown today and bought (B) some bread for refreshments (C) before going home. (D) Have you bought some bread also?

4. Although he is lazy, (A) but he is intelligent. Everybody spent a few days (B) going over the old notes, but he did it (C) in two days or so, and (D) the result was marvellous.

5. X: (A) Is there anything special about the garden?
Y: (B) There is several pots of orchid flowers there. (C) That’s all. (D) Nothing special.

6. X: I need a big box (A) to put waste paper in. (B) Can you get me one?
Y: (C) As a matter of fact, I have one. (D) Do you want?

7. X: I prefer this map. (A) It’s more better than that one.
Y: But that one is (B) newer than this one. (C) Besides, (D) it is less expensive.

8. X: John said that he (A) liked skiing better than skating. Do you (B) like to ski too?
Y: Yes, (C) I did. But I (D) prefer skating to skiing.