---“Excuse me, sir? Would you mind moving a little bit to the left? You ______ my view of the screen.”

   ---Oh, sorry I ________ it.

   A. are blocking out; didn’t realize       B. are blocking up; haven’t realized

C. have blocked up; don’t realize      D. have blocked out; didn’t realize

---“Excuse me, sir? Would you mind moving a little bit to the left? You ______ my view of the screen.”
---Oh, sorry I ________ it.

A．are blocking out; didn’t realize	B． are blocking up; haven’t realized
C．have blocked up; don’t realize	D．have blocked out; didn’t realize

---“ Excuse me, sir? Would you mind moving a little bit to the left?

--- You are ______ my view of the screen.”---Oh, sorry I ________ it.

A. breaking out; didn’t realize　 B. blocking out; haven’t realized

C. coming up; don’t realize　　 D. blocking out; didn’t realize