问题补充：
Which of the following sentences is wrong?
A. What will you do with the old books?
B. How will you deal with the old books?
C. This box is too heavy to carry.
D. We are looking forward to see the famous singer.
答案：
A. What will you do with the old books?
B. How will you deal with the old books?
C. This box is too heavy to carry.
(答案→)D. We are looking forward to see the famous singer.
解析：句意：下列句子哪个是错误的？根据分析可知选项D中to是介词，后面接名词或者动名词作宾语，故本句语法错误，选D。
