填空题

The white ants are not dangerous, but they destroy every wooden object into which they enter, If white ants get into any wooden object, such as a table, they (11) the inside of the wood completely. They can destroy the wooden (12) of a house so completely that the house falls down. If they eater a box of books, the (13) box of books will soon be destroyed. But it is easy to keep these ants away, for they cannot cross water. It is easy to stand the legs of a table in cups of water, and then they cannot reach it.
A nest of white ants may easily be destroyed by (14) the queen, If a hole is made down to the bottom of the nest, the queen can usually be found quite easily, for she is (15) —over an inch long.