单选题 The purpose of this letter is to ______.

A、 tell the customers about the quality of their products
B、 express the company's thanks to the customers
C、 prove the excellent service of the company
D、 inform the customers of a new catalogue

【正确答案】 D

【答案解析】[解析l写这封信的目的是什么呢?短信的最后一句话说“Our special summer catalogue is at the printers and should be in your home soon．”，由此可知，写这封信的目的是告知客户，他们将收到夏季商品目录，故答案选D。