Заполните пропуски в предложениях подходящими союзными словами: who, that, which, when,

Заполните пропуски в предложениях подходящими союзными словами: who, that, which, when, where, why, how... The managers report showed our company had had a very difficult year. The report revealed the reasons our company had lost its major customers. Our profits went down steadily from June to October we sold only 50 % of our products. Mr. Black heads the Marketing Department informed us about their research results. The drop of sales can be explained by the global crisis was dramatic.