Question

It was nearly mid-night ________ Henry began to feel terrible．

1. A.
   until
2. B.
   that
3. C.
   when
4. D.
   while

Answer 1

C
until前面应该用表示动作的延续动词；that和it构成强调句式时mid-night前应该加介词at; while在引导时间状语从句时其谓语动词用延续性动词，故C为最佳答案。在此when相当于at that time。句意为：午夜时，亨利突然感到不舒服。