Who's this? [ ]
A. This is Li Ming's father.
B. He's a worker.
答案：A
—Is Sally from America?
—Let me ______. [ ]
A. have a look
B. to see
C. have a look at
D. to have a look
某工程施工时，因业主原因造成某工作拖延一周，该工作有5天总时差，2天自由时差，则承包商可获得工期索赔为( )天。
A．12B．15C．21D．0
