单选题 Even though sewing machines are very common now, it can be more ______ to assemble quilt tops by hand while sitting and chatting with family members.
【正确答案】 B
【答案解析】[解析] 词汇：形容词
1．这是一道词汇题，选项均由形容词构成。
2．原文意思是“和缝纫机相比，手工制作效率更高”，B．efficient为正确选项。