单项选择题
Customers often remain（）to a business that has excellent service even if their prices are high.
A.loyalB.loyallyC.loyalty
单项选择题 To be deductible，the dominant motive for incurring an expense must be（）the relationship to a business activity.
单项选择题 The responsibilities of a food and drug administration bureau is（）.
单项选择题 Why is it necessary for supervisors to make a list of pest control measures？（）
