_______ bikes are new, but _______ are old.A. Our; theirB. Our; theirsC. Ours; theirs
Talk to your teacher and you will get help ________ you have a problem.
We have friends to help us fight against pollution, and trees are one of ________.
Now, people regard drinking tea ________ a culture more than a habit.
Our mother earth gives us ________ we need in our daily life.
Three bridges ________ over the river five years ago.