Each question in this section has a sentence with three underlined parts labelled (a), (b) and (c). Read each sentence to find out whether there is any error in any underlined part and indicate your answer in the Answer Sheet against the corresponding letter i.e., (a) or (b) or (c). If you find no error, your answer should be indicated as (d).

(a) He came to report that the work went very slowly / (b) because the X-ray machine was not working very good / (c) that morning.