Read the following passage and circle the letter A, B, C, or D to indicate the correct word or phrase that best fits each of the numbered blanks 

Successful shop assistants should have excellent communication skills and understand customer (1). They have to be friendly and helpful, especially when working in clothing stores or fashion houses. They also need to have good problem-solving skills and an ability to think on their feet to deal with difficult situations (2) may occur during their working hours.

A shop assistant usually works alongside a cashier. The shop assistant directs the customers to cashiers (3) they are ready to purchase items. They might also (4) any cashier duties when understaffed.

Successful shop assistants should have excellent communication skills and understand customer (1).