问题补充：
The most delicious cake in the world by mom. Please wait an hour to enjoy it.
A. makes
B. is made
C. is being made
D. is making
答案：
A. makes
B. is made
(答案→)C. is being made
D. is making
解析：考查时态：句意：妈妈正在做世界上最可口的蛋糕，请等上一个小时就可以吃了。所以蛋糕正在被做，用现在进行时的被动语态，选C。
