Some hard working students always keep a torch in their dormitories _____ there is a power failure．
A． if B． unless
C． so that D． in case
_____ in charge of two classes made Mrs．Li, head of Senior Grade 3, extremely tired．
A． Leaving
B． Left
C． Being left
D． Having left
Almost every teenager will experience a period in their life _____ they aren’t content with their parents．
A． when B． where C． that D． which
Little did the teacher imagine that a student good at maths _____ have failed in the exam．
A． might B． should C． need D． would
— I’ve never seen you so rude!
— I _____ something I shouldn’t have, but I didn’t mean that．
A． have said B． had said
C． did say D． was saying
Tom was sorry to learn that his grandfather _____ for half an hour when he got to the hospital．
A． had died B． had been dead
C． Died D． has been dead
