Resposta :
Resposta:
a. was playing - saw a frog (como nĂŁo tem verbo entre os parĂȘnteses, assumi que fosse algo do gĂȘnero)
b. were having - it started to rain
c. was swimming/swam - was playing (a primeira opção Ă© ambĂgua, mas a segunda Ă© -ing, contudo, Ă© provĂĄvel que seja a Simple Past)
d. looked/looked - was sleeping (a primeira opção Ă© ambĂgua, mas a segunda Ă© -ing, contudo, Ă© provĂĄvel que seja a Simple Past)
e. were cooking -appeared