There was no sign _______ they had died from diseases such as bird flu - the main worry in such cases. Among the theories was _______ a truck had collided(碰撞)with the crowd.
My grandmother has kept the photo ______ she can see it every day for a couple of decades.
Bob is in a hopeless situation, ______ we will keep a very close eye on.
In the past decades, sea ice ______ in the Arctic as a result of global warming.
I know you don’t like her, but try not to make it so ______.
Schools in the north tend to be better equipped, ______ those in the south are relatively poor.