With the exam ______ in ten minutes, they were asked to hand in their mobile phones．
A． taken place B． taking place
C． having taken place D． to take place
More than one doctor _____ involved in the rescue that took place after the earthquake．
A． was B． is C． were D． are
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
