Question

Our class adviser doesn't doubt, in any case, ________ we can overcome the difficulties in our study. He always gives us a confident smile.

1. A.
   how
2. B.
   whether
3. C.
   that
4. D.
   /

Answer 1

C
句意：我们的学习顾问在任何时候都不怀疑我们可以克服学习中的困难的能力。他总是给我们一种自信的微笑。doubt的否定式加宾语从句，要用that引导。