Respuesta :
10) John (be) is excited.
11) Tiffany and Uma (be) are my friends.
12) Ricardo, John and I (be) are watching a movie.
13) Hadil (be) is kind.
14) Alisa (be) is young.
15) The hammer (be) is new.
16) My mother and father (be) are cooking dinner.
17) Rachel (be) is driving to school.
18) Nikkos and Billy (be) are playing at the park.
19) The students (be) are studying English.
20) The test (be) is hard!
21) My best friend (be) is coming to my house.