. They gave us so warm a welcome that we were moved very much. It was a sight we.A. what;h

问题补充：

. They gave us so warm a welcome that we were moved very much. It was a sight we.

A. what;have never forgotten

B. which; wre never forgotten

C. as ;will never forget

D. that; would never forget

答案：

A. what;have never forgotten

B. which; wre never forgotten

C. as ;will never forget

(答案→)D. that; would never forget

解析：考查定语从句。根据主句的was可知，从句用过去时的某种时态。what不能引导定语从句，先行词sight是物，引导词用that或which。故选D。