21.They will fly to Washington, they plan to stay for two or three weeks. (A)where (B)there (C)which (D)when

73. Why do more choices of goods give rise to anxiety? (A)Professionals find it hard to decide on s suitable product (B)People are likely to find themselves overcome by business persussion. (C)Shoppers may find themselves lost in the broad range of items. (D)Companies and advertisers are often misleading about the range of choice.