she tells him the truth now he’ll simply keep on asking her until she does.A. UnlessB. On

问题补充：

she tells him the truth now, he’ll simply keep on asking her until she does.

A. Unless

B. Once

C. If

D. Immediately

答案：

(答案→)A. Unless

B. Once

C. If

D. Immediately

解析： 考查连词。Unless 除非，Once 一旦，If 如果，Immediately 立刻，一……就，句意：除非她现在告诉他事实，不然的话，他将继续问她知道她告诉他为止。所以选A。