1．________

the weather and managed to make weather forecasts (预报).

2．________

The following is some of their findings．Sometimes

3．________

distant objects like hills and tall trees seemed

4．________

to be clear and near．This is the sign of much

5．________

water, that shows that rain will probably come.

6．________

When distant sound, such as the noise from far-off(遥远)

7．________

trains, are heard very clearly, wet and storm weather

8．________

is coming．If you will see a rainbow during rainy

9．________

weather, it shows that it will clear up and fine.

10．________

1．________

in how do children learn to speak their

2．________

native language for a important reason．If

3．________

we knew how children learn their native

4．________

language, perhaps we would have easy way

5．________

to teach adults, as good as children, a second

6．________

language．This is an interested idea．Some

7．________

foreign language teachers believe in the adults

8．________

learn a second language with the same way

9．________

like children learn their native language.

10．________