Today is my sister's birthday She ___ (cut) her brithday cake now

Today is my sister's birthday She ___ (cut) her brithday cake now
Today is my sister's birthday She ___ (cut) her brithday cake now

Today is my sister's birthday She ___ (cut) her brithday cake now
is cutting

这个句子是用的现在进行时，Now表示现在，所以用 is cutting

希望对你有帮助哦~