问题补充：
The children all look forward to the carnival next week.
A. take part
B. take part in
C. taking part
D. taking part in
答案：
A. take part
B. take part in
C. taking part
(答案→)D. taking part in
解析：句意：孩子们都期待着参加下一周的狂欢节。look forward to期待，to是介词。后面用动词的-ing形式。后面跟宾语则必须有介词in。故选D。
考点: 考查动名词的用法。
