You can imagine what great tuouble wehad_____ the school for the blind.

No one but the experts in this field can _____ the difference between them.

Mum, can I have something________–Oh, dear. You can only drink some water. There is________ in the kitchen.

On three minutes of silence in memory of thevictims in Yushu Earthquake .

The officials soon realized that,__________, things would get worse.