作业帮They couldn't find the pet.同义句They ____ not ____ ____find the pet.
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They couldn't find the pet.同义句They ____ not ____ ____find the pet.
They couldn't find the pet.同义句They ____ not ____ ____find the pet.
They couldn't find the pet.同义句They ____ not ____ ____find the pet.
were able to
were able to
They couldn't find the pet.同义句They _are___ not __ able __ __to__find the pet.
They were not able to find the pet.