( ) 11. --- Oh, it’s you! I ________ you.
--- I’ve just had my hair cut and I am wearing new glasses.
A. didn’t recognize B. hadn’t recognize C. haven’t recognize D. don’t recognize
( ) 12. One of the engines of the plane was out of order and the bad weather ________ the difficulty.
A. added to B. added up C. added up to D. added
