-Be careful. You might fall into the river.---Thank you. I I so close to itA. didn’t

问题补充：

---Be careful. You might fall into the river.

---Thank you. I I so close to it．

A. didn’t know; am standing

B. don’t know; am standing

C. didn’t know; was standing

D. didn’t know; would standing

答案：

A. didn’t know; am standing

B. don’t know; am standing

(答案→)C. didn’t know; was standing

D. didn’t know; would standing

解析：此题重点考查宾语从句的时态和语序问题，无论哪种句式结构充当宾语从句都要用陈述句语序，从句的时态要和主句的时态保持一致。主句的谓语动词是过去式从句的谓语动词也要用相应的过去时态。若从句表达的是真理或客观事实，不管主句的谓语动词是何种时态从句都要用一般现在时。根据语境可知此句表示我刚才不知道自己站的那么靠近它，现在知道了，故用过去时，故选C。