1. Person A and Person B go to a sandwich shop with 30 yuan. A sandwich costs 4.5 yuan, and a drink costs 1 yuan. They plan to use the 30 yuan to buy as many sandwiches as possible, and then use the remaining money to buy drinks. How many items of drinks and sandwiches can they buy in total?
(A) 6
(B) 7
(C) 8
(D) 9
(E) 10
1. D.

Since $30=4.5 \times 6+3$, and $3<4.5$, so they can buy at most 6 sandwiches, and the remaining money can buy 3 cups of drinks.
Therefore, they can buy a total of $6+3=9$ items.