As he reached back door Jack saw strange sight.A. the ; /B. a; theC. /; aD. the ; a

问题补充：

As he reached back door, Jack saw strange sight.

A. the ; /

B. a; the

C. /; a

D. the ; a

答案：

A. the ; /

B. a; the

C. /; a

(答案→)D. the ; a

解析：考查冠词的用法。第一空是特指那个后门；第二空泛指一副奇怪的景象。句意：当他到达后门的时候，Jack看到了一副奇怪的景象。