Listen and practise the sentences. Underline the words with /bl/, and circle the words with /kl/.
1. Look! There are black clouds all over!
2. A truck blocked the way to the club.
3. The students painted the classroom blue.
4. The wind blew the clock down.
5. We cleaned up the environment after the blast.
/bl/: black, block, blue, blew, blast
/kl/: clouds, club, classroom, clock, cleaned