单选题 Before Christmas all the shops are ______ with customers.
A. loaded B. jammed C. charged D. mixed

【正确答案】 B
【答案解析】[解析] 词义辨析题。圣诞节前夕，商店里到处都是顾客。load，装载；jam，拥挤；charge，掌控；mix，混合。