—Are there any tickets left? —Sorry. There are ________, if ________.
Tom looked upon the test as an obstacle _____ his classmates regarded it as a challenge.
You don’t have to ______every little incident in your life.
--Why are they _____ the forest? --They are _____ a thief.
Facing the enemies, Liu Hulan ______ .
They insisted that he _____ present at the ceremony the next week.