Choose the letter A, B, C, or D to indicate the underlined part that needs correction

Choose the letter A, B, C, or D to indicate the underlined part that needs correction. (1,0 point)

Question 30:  I haven’t seen (A) Hoa again (B) since we have graduated (C) from (D) high school.

Question 31:  I was (A) lieing (B) in the bath ( C ) when the phone rang (D).

Question 32: I know you are too busy (A) to stay (B), but I look forward (C) to see (D) you again.

Question 33:  Look (A) at those black(B) clouds! It ( C)is going to (D)raining

Question 34:  She (A)was cooking(B) when he was watching ( C) T.V(D)

Question 35: The students(A) are interested(B)  with (C)  learning (D)English at school.