Resposta :
Olá, bom dia, segue abaixo as respostas:
13) letra C
14) letra B
15) letra C
16) letra C
17) negativa: This ordinary family is never doing new things
interrogativa: Is this ordinary family doing new things?
18) My brother is watching tv at the moment
19) My mother is cooking rice.
Espero ter ajudado :)