Four parts have been underlined and lettered A, B, C, and D. Identify the error. 

1. X: One of us (A) cleaned the room (B) soon.
Y: But it (C) has already been cleaned, (D) hasn’t it?

2. X: (A) Are you waited for me, (B) Clara?
Y: (C) Yes, I am. (D) Where were you a few minutes ago?

3. X: (A) Don’t worry for such trifling things. They are (B) not important.
Y: It is difficult (C) not to worry. Trifling things may turn out to be important things (D) someday.

4. X: There may be (A) something wrong with my watch. It stopped working (B) without my knowledge.
Y: (C) Why not adjust it? It is exactly 2.30 p.m. (D) in my watch.

5. X: Where is John? (A) I have been looking for him.
Y: I haven’t seen him (B) either. (C) Some say he has been on vacation (D) from last week.

6. X: Which book do you prefer, Maria? (A) This one or that one?
Y: (B) I prefer this one than that one. (C) How about you?
X: (D) I prefer that one.

7. (A) My friend and I(B) decided to go to the concert last night. (C) We got to there at 8.15 p.m. We were (D) a few minutes late.

8. There were traffic jams (A) on my way to the cinema. (B) Besides, the bus came late. Fortunately, (C)  arrived the cinema (D) on time.

9. As Sam (A) has forgotten to bring his book (B) with him, he has to share (C) it with John, who is sitting (D) besides him.