---Where are your parents?
---They are in the kitchen, they the dinner for the party the whole day.
A. are preparing
B. have been prepared
C. have been preparing
D. were preparing
网友回答
A. are preparing
B. have been prepared
(答案→)C. have been preparing
D. were preparing
解析：考查时态：句意：--你父母在哪里？--他们在厨房，他们一整天都在为聚餐做准备。说明父母准备聚餐是从过去一直到现在，用现在完成进行时。选C。