My watch doesn't work, I must have it ___.

We ran down to the shore in time to see an enormous animal opposite us _____itself out of the water and then _____ down again, which was a whale..

Great attention must be devoted ________ agriculture(农业), especially in China, ______ population is the largest in the world.

Last summer, I went back to my hometown,     the neighbors and the houses that I used to be familiar with were gone．

---What made you so angry?