Don’t trust such people praise you to your face but speak ill of you behind your back.A.

问题补充：

Don’t trust such people praise you to your face but speak ill of you behind your back.

A. who

B. whoever

C. that

D. as

答案：

A. who

B. whoever

C. that

(答案→)D. as

解析：考查定语从句。当先行词前面有such/the same/as many/as much修饰时，关系代词用as;本题的as指代people在句子中做主语。句意：不要相信那种的当面表扬你背后却说你坏话的人。