Exercise 1: Write the following words in the correct columns. 

hour              nose               flower               cold               tower

boat               old               around                low                 our 

Answer:

• /əʊ/: nose, cold, tower, boat, low

• /aʊ/: hour, flower, old, around, our

Exercise 2: Read aloud the short poem. Pay attention to the underlined words.

In November it s very cold.

The temperature is usually low.

There are no flowers anywhere to see.

Only white snow falling everywhere.

Don't play outdoor without warm clothes.

Or you'll catch a serious cold with running dog.