Most of us have spent time at a museum，looking at and learning about the things there.Every year，museums put a lot of money and work into keeping their objects （物品） in good（1）c

ondition

ondition

.They make sure the temperature and light levels are always just （2）r

ight

ight

and that the air isn't too wet.
    However，even if all of them are correct，some things can still be harmful to a valuable object—insects （昆蟲）.Often they enter the museum inside the object itself.They may （3）a

lso

lso

be brought in by accident on visitors' clothes.Once inside the museum，they can quickly （4）m

ove

ove

from one object to another，and they enjoy eating natural material （材料） such as wood，cotton，silk and wool.
    Museum experts （專家） say that the older the objects are，the more the insects seem to like them.That's a problem because these things can't（5）e

asily

asily

be repaired.As a result，museums will try almost anything to （6）s

top

top

insects from harming their collections.For example，a new object will be kept separately at first.Then，when staff（工作人員） are sure there are no insects inside，it can be put on show.If insects are（7）f

ound

ound

in a piece of clothing or art，placing it in a freezer （冷凍柜） is one way of getting rid of （除掉） them.
    But now one museum in the US has decided to try something new.They are（8）t

raining

raining

a dog to find insects.Dogs have an（9）e

xcellent

xcellent

sense of smell.Usually the dog sits down to show what it has found.Staff at the Museum of Fine Arts，Boston hope that their dog，Riley，will learn to do this when it finds insects.They say that at the moment it's just an experiment.However，if Riley can help find insects （10）b

efore

efore

they do a lot of harm，other museums are sure to be interested.