5. Identify mistakes in the sentences below by circling A, B, C or D. 1. The (A) first edition of the book had already (B) come out by (C) the time they discover (D) the error. 2. When I had called (A) you up last night, I knew (B) you would be busy (C), but you didn’t have to (D) be so rude. 3. The waiters at (A) the new restaurants haven’t received (B) proper training in (C) food service before they came to work there (D). 4. I was (A) quite surprised when I walked into (B) my office yesterday because I didn’t know (C) that my colleagues planned (D) a birthday celebration for me. 5. I waited (A) for her for (B) 2 hours when she arrived (C) so I got (D) very angry with her and told her not to be late again. 6. Because (A) the survey has produced (B) unexpected results, the (C) team decided to test (D) the questions again. 7. He asked (A) several investors to invest (B) in (C) his company before he finally found (D) somebody to agree. 8. The reassuring (A) financial report made the stock holders much (B) happier about their investments than (C) they will be (D). 9. Mrs. Barner drove (A) his car to (B) work when the accident happened (C) and damaged (D) her car. 10. The owner of the restaurant told (A) me that her new head chief, who received (B) his training at culinary schools in (C) Europe was (D) very good at cooking European dishes.