单项选择题
（） our general agent, you would also have to look after the advertising.
A.Be B.For C.Tobe D.As
单项选择题 I have received （） professional training.
单项选择题 I think your sister is old enough to know （） to spend all her money on fancy goods.
单项选择题 In addition to setting the price of a product, business firms must decide （） to offer special discount and credit terms to their customers.
