You should consider carefully the car you want to buy is worth the money.A. thatB. whichC.

问题补充：

You should consider carefully the car you want to buy is worth the money.

A. that

B. which

C. whether

D. what

答案：

A. that

B. which

(答案→)C. whether

D. what

解析： 句意：你应该认真思考是否你想买的车值这个价钱。Consider后面接的是宾语从句，根据句意应该用whether连接宾语从句，表示“是否”，that连接宾语从句的时候，从句的意思是完整的，which哪个，what什么，所以选C。