A terrible earthquake struck Sichuan Province on May 12, _____ tens of thousands of lives.
The place _______ the bridge is supposed to be built should be________the cross-river traffic is the heaviest.
The shopkeeper did not want to sell for ________ he thought was not enough.
Danby left word with my secretary ________ he would call again in the afternoon.
Do you have any ideas ________ is actually going on in the classroom?
Elephants have their own way to tell the shape of an object and ________ it is rough or smooth.