Fill in the gaps with verbs in the proper progressive form . i. Listen! The birds (sing) 2. We (drive) to the mountains this time next Saturday. 3. They (have) ... a picnic, when the rain started 4, I (read) a book last eveni...

Fill in the gaps with verbs in the proper progressive form . i. Listen! The birds (sing) 2. We (drive) to the mountains this time next Saturday. 3. They (have) ... a picnic, when the rain started 4, I (read) a book last evening when I heard the fireworks. 5. Shhhh! Be quiet! My little sister (sleep) 6. They (not / do) ... their homework this afternoon: tomorrow's the weekend. 7. By this time tomorrow l (swim) ..in the central pool. 8. Mark and I (play) a computer game now. 9. I saw them. They (wait) ... in front of the shop.