5. Complete the sentences with the correct form of be and the -ing forms from exercise 1. 1 I __________ a skirt 2 We __________ gymnastics. 3 My mum __________ a cake in the kitchen. 4 Brenda __________ the Christmas tree. 5 Joe's at university. He __________ French. 6 Jake and Judy __________ in the pool. 7 Tina __________ a shower. 8 The cat __________ by the fire. 9 They __________ chess. 10 Mark __________ in the park.