Remember that there is still one point ______ we must make clear at the conference tomorrow.

A．where

B．why

C．when

D．that

设有语句 int n,m; char a[5],b; cin＞＞n＞＞a＞＞m＞＞b; 为了分别将10和20分别赋给n和m，look赋给a，t赋给b，则正确的输入为

A．10 "look" 20 't'＜CR＞

B．10 "look" 10

C．10 look 20 t

D．10＜CR＞look20＜CR＞t＜CR＞