Comtplete the sentences. Fill in: am,is,are.
Example: Could i phone you letter? I ... doing my homework now.- I am doing my homework now.
1.Where is Ann? - In the living room. She ____ arranging flowers in the vase.
2.Why ____ William crying? - He can't find his ball.
3.What ____ you doing? __ Sh-sh! it's a surprise.
4.The children ___ deocrating the room for the New Year party.Will you help them?
5.Who _____ singing? -My sister.