用am, is 或are填空。
1.I______ a girl. You _______ a boy.
2.Daming ________ from China. Amy and Sam _______from England.
3.She ________ jumping. He ______ running.
4.My brother _______ playing football with his friends. They ______ happy.
5.We _______rowing a boat.
6.What ______you doing? I ______ skipping.
7.Lingling and I _______ doing taijiquan.