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：本题是强调句的考查，只是在题干中，提供了很多的信息。a sight作原句中动词forget的宾语。
