Section C.15.A) To apply for a job.B) To ask for leave.C) To cancel an appointmentD) To change an order16.A)180.B)118.C) 100.D) 8017.A) Sports shoes.B) sun glassesC)A sun hatD) A T-shirt18.A) He is a regular customer of the store.B) He is one of her friends.C)He is the manager of the storeD)He is a new customer of the store.19.A) 300 dollars.B）240 dollarsC) 200 dollars.D) 140 dollars.