Question

【题目】We are looking forward to ____on the moon some day.
A.walking
B.walk
C.walked
D.walks

Answer 1

【答案】A
【解析】句意：我们盼望有一天能在月球上行走。look forward to doing sth.：盼望(期待)做某事，此短语中to是介词,后面应该用名词或者动名词形式。结合句意可知选A。