Question

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

A．Unless

B．Once

C．If

D．Immediately

Answer 1

A

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。