Respuesta :
Answer: [First sentence] We will not receive the final pieces that we needed to complete the collection.
Explanation: In the second and the fourth sentences, there is no reason to use the past perfect tense because there is no simple past time reference (before which the past perfect verb would take place), while in the third sentence, it is not coherent to put the verb need in the future tense.
Answer:
We have not received the final pieces that we will need to complete the collection.
Explanation: