The public transport system in Beijing is very good now, so there _____be any difficulty in traveling around the city.
Thousands of people lined up to lay flowers in front of a 28-story high-rise in Shanghai, _______a terrible fire killed at least 58 people.
I don’t know the reason _______ you were absent from the meeting, and I am not sure that someone will tell me the reason _______ you haven’t told me.
She said she was sorry ________ the train, so she had to stay for another day.
The actress looked so charming in the beautiful Vera Wang dress that photographers took _______ pictures of her.
Our maths teacher set so difficult an examination problem ______ none of us worked out.