我爸爸正在房间里给叔叔写信．intheroomnow．

Question

我爸爸正在房间里给叔叔写信．
___in the room now．

Answer 1

答案：My father is writing to my uncle．表达的是正在进行的事情用现在进行时be+doing，主语my father三单，故is，写信给某人write to sb，故答案是My father is writing to my uncle．