Fill in the blank
tú verdad anoche. (saber)
nosotros la dirección en el sobre. (poner)
yo las maletas en mi habitación. (poner)
ustedes marta tuvo un accidente. (saber)
tú no la tarea. (poder)
armando en la piscina todo el día. (estar)
mariana no que venir a la clase ayer. (tener)
vosotros al teatro. (andar)

Supiste is the conjugation of the irregular verb saber that matches the second person singular in the preterite tense. This tense is one of two simple past tenses. It is used to describe actions that took place or were completed at a certain point in the past. The second person singular is tú. Finally:

Tú supiste la verdad anoche (You knew the truth last night)

Pusimos is the conjugation of the irregular verb poner that matches the first person plural in the preterite tense. This first person plural is nosotros. It is important to say here that you need to learn by heat conjugations of irregular verbs because there is no any rule for this type of verbs. Finally:

Nosotros pusimos la dirección en el sobre (We put the address in the envelope)

Puse is the conjugation of the irregular verb poner that matches the first person singular in the preterite tense. This first person plural is yo. It is important to say here that you can take away the subject pronoun in a Spanish sentence if you know the context of it. Therefore, these two sentences are valid:

And both translates into:

I put the suitcases in my room

Supieron is the conjugation of the irregular verb saber that matches the second person singular (formal you) in the preterite tense. This second person singular that matches the formal you is ustedes. We use ustedes when addressing a person in a polite way. Perhaps your teacher, your boss or a person older than you. In this way, you show respect. Finally:

Ustedes supieron que Marta tuvo un accidente (You knew that Marta had an accident)

Pudiste is the conjugation of the irregular verb poder that matches the second person singular tú in the preterite tense. This sentence is given in negative form. Negation is an expression that means no and is used to contradict some or all of the meaning of a positive sentence. Finally:

Tú no pudiste hacer la tarea (You couldn't do the homework)

Estuvo is the conjugation of the irregular verb estar that matches the third person singular in the preterite tense. Armando can be replaced by the subject pronoun for the third person singular in masculine form él. Here we use the verb estar as location, describing where a person was temporarily. Finally:

Armando estuvo en la piscina todo el día (Armando was in the pool all day long)

tuvo is the conjugation of the verb tener that matches the third person singular in the preterite tense. Mariana can be replaced by the subject pronoun for the third person singular in feminine form ella, that translates into she. This is also a negative sentence. So this can be written as follows:

Mariana no tuvo que venir a la clase ayer (Mariana didn't have to come to class yesterday)

Anduvisteis is the conjugation of the verb andar that matches the second person plural (vosotros) in the preterite tense. In Spain, it is more common to use vosotros when addressing someone in an informal way. Ustedes also matches the second person plural and is used in Spain in an formal way. However, it is more common to use ustedes either in a formal and informal way in Latin America. Finally:

Vosotros anduvisteis al teatro (You went to the theater)