阅读下面短文，从短文后所组的A、B、C三个选项中选出能填入相应空白处的最佳选项。

mr. jonEs hAD A FEw{{u}} (41) {{/u}} holiDAy, so hE sAiD, "i’m going to thE mountAins {{u}} (42) {{/u}} trAin." hE put on his BEst ClothEs, took A smAll BAg, wEnt to thE stAtion AnD {{u}} (43) {{/u}} thE trAin. hE hAD A vEry BEAutiFul hAt, AnD hE oFtEn put his hEAD {{u}} (44) {{/u}} thE winDow During thE trip AnD lookED At thE mountAins.But thE winD BlEw his hAt {{u}} (45) {{/u}}. mr. jonEs {{u}} (46) {{/u}}took his olD BAg AnD thrEw it out oF thE winDow, too. {{u}} (47) {{/u}} pEoplE in thE CArriAgE lAughED、"is your BAg going to Bring your hAt BACk " thEy AskED、 "no," mr. jonEs AnswErED、"But thErE is {{u}} (48) {{/u}} A nAmE {{u}} (49) {{/u}}An ADDrEss in my hAt, AnD thErE is A nAmE AnD An ADDrEss on thE BAg. somEonE’s going to FinD Both oF thEm, AnD hE is going to {{u}} (50) {{/u}} mE Both thE BAg AnD thE hAt."

A．

A、on

B．

B、By

C、

C、in