Question

—Why do you look worried?
— Because what I am really concerned about is _____my friend can do me a favor or not..

A．although

B．whether

C．when

D．where

Answer 1

B

考查表语从句，句意：你为什么看起来很担忧？因为我的确关注的是我的朋友是否会帮助我还是不帮。根据句意应用关系词whether，选B。