_____ the diamond, he had to look for a place to hide it.
The boy decided to climb the mountains _______ he knew he would face many difficulties.
China has been pushing the reform of public hospitals _______ all its citizens.
In many people’s opinion, that company, though relatively small, is pleasant _______.
Let’s not wait any longer, he might not _______ at all.
Special attention should be paid _______ our earth from _______.