第7题: [单项选择]Having decided to rent a flat, we______ contacting all the accommodation agencies in the city. A. set about B. set down C. set out D. set up 参考答案:A 答案解析:A项的“set about 着手进行”符合题意。其他三项中,B项 set down 意为“使飞机着落,让乘客下去,放下”,C项set out意为“出发,陈述”,D项 set up 意为“搭起,建立,树