—Did you sec anyone coming into the building?—No I didn’t—?—There is no doubt about it.A.

问题补充：

—Did you sec anyone coming into the building?

—No, I didn’t

—?

—There is no doubt about it.

A. OK

B. Sure

C. Really

D. Is that so

答案：

A. OK

(答案→)B. Sure

C. Really

D. Is that so

解析：可联系答.案.网客服索取。