The keeper of the spring cleared away the leaves and branches, and wiped away the silt(淤泥) that would _______ have choked and polluted the fresh flow of water.
We should look up to him as a shining example of ________ to duty.
Kelly gave me a vivid ________ of her trip to Mount Tai after her return.
Nowadays,few people form the habit of keeping a supply of candles in the house in case of power ________.
—Could you tell me the way to ________ Johnsons,please? —Sorry,we don't have ________ Johnson here in the village.
________ material used for running tracks in schools across China may be ________ danger to children's health.