请选择DCBA'v3~1c(u)F Let John ___________milk and bread for breakfast himself. He’s ten years old now.8E9v-i9}3U6I1a){8u
A. buy8E9v-i9}3U6I1a){8u
B. buys8E9v-i9}3U6I1a){8u
C. bought8E9v-i9}3U6I1a){8u
D. is buying8E9v-i9}3U6I1a){8u