Mr. Lee made a rule that we must come to school on time.A. thatB. thisC. itD. which

问题补充：

Mr. Lee made a rule that we must come to school on time.

A. that

B. this

C. it

D. which

答案：

A. that

B. this

(答案→)C. it

D. which

解析：句意:李明博规定我们必须按时来上学。it 作形式宾语，that we must come to school on time作真正宾语从句。故选C。