—Did you return Fred’s call?—I didn’t need to I’ll see him tomorrow.A. thoughB. unlessC.

问题补充：

—Did you return Fred’s call?

—I didn’t need to I’ll see him tomorrow.

A. though

B. unless

C. when

D. because

答案：

A. though

B. unless

C. when

(答案→)D. because

解析：考查连词用法。题干中答句意义是“我不需要回电话，因为我明天就会见到他”。