"in case something was wrong" or "as if something was wrong"?
Last December,just a week before Christmas,I went to a local KMart store to pick up my layaway.Upon reaching the counter, I handed the clerk my layaway receipts and told her I was there to pay off the balance and take the goods home with me.She grabbed my receipts,and kept messing with the computer ________ something was wrong.I felt a little uneasy.I was expecting her to tell me my layaway had been misplaced or something of the sort.
It is a cloze test. May I ask why can't I say "in case something was wrong" because the key is "as if something was wrong"? Thank you.