Hurry up! The plane is in fifteen minutes.A thinking of B waiting for C taking off D walk

问题补充：

Hurry up! The plane is in fifteen minutes.

A thinking of B waiting for C taking off D walking up

答案：

解析：A.考虑 B.等待 C.起飞D.登上。句意：快点！飞机在十五分钟后起飞。故选C。