Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrases that best fits each of the numbered blanks.

        It was a Monday morning in the office and, as usual, everyone was busy sorting through their mail before starting work. The other staff had (12)____ that Nicky , one of the computer operators, had been (13)____ rather miserable recently and they wondered what might have been happened to make her so (14)____. Suddenly Nicky accidentally knocked over a cup of coffee. As she was clearing up the mess, the girl sitting next to her happened to glance at Nicky's right hand. There was a large swelling at the wrist. "What on earth have you (15) ____ to yourself? Does it hurt?" asked the girl. " Yes, it does. I think I've injured it using the computer", replied Nicky. " I think you'd better go and let the doctor (16) ____ it", said the girl. " Let's hope there's no permanent damage to your hand" .

Điền vào số (13)