El botones translates into bellman and is a man who works in a hotel, carrying bags or bringing things to the guests' rooms. The word el is the definite article that matches masculine singular noun. This is the case of the noun botones. Therefore, we have the following sentence:
El botones lleva las maletas
La habitación individual translates into single room and is a room with a single bed, which is intended for one person to sleep in a hotel or rented accommodation. Here habitación is a feminine singular noun, la is the definite article in feminine and singular form and individual is an adjective. Finally:
La habitación individual tiene una cama
Las llaves translates into the keys and is the set of small pieces of metal that are used for opening or locking a door or a container. Since llaves is a feminine plural noun, we must use the definite article that matches this, which is las. Therefore, our sentence is:
Uso las llaves para entrar en mi habitación
El ascensor translates into the elevator and is a machine that carries people up and down between the levels of a tall building. Since ascensor (also called elevador) is a masculine singular noun, we need to choose the corresponding definite article that matches this, which is el. Finally:
Uso el ascensor para subir a mi piso.
Un viajero translates into a traveler and is someone who is traveling or who travels often. Since viajero is a masculine singular noun, we choose the corresponding indefinite article that matches this, which is un. The indefinite article is used to refer to a particular person or thing when the reader or listener doesn't know which one is being described. Finally:
Una persona que viaja es un viajero
El cuarto de baño translates into the bathroom and is a room containing a toilet and often a bathtub or shower. It is also valid to say simply el baño, that also means the bathroom. In this way, I put the toothbrush and the shampoo in the bathroom. Finally:
Pongo mi cepillo de dientes y el champú en el cuarto de baño
El cheque translates into the cheque and is a printed form on which we write an amount of money and who it is to be paid to. The bank then pays the money to that person from our account. So cheque is a masculine singular noun, so the corresponding definite article is el that matches the mentioned form. Accordingly, I need to sign the cheque that is in Spanish:
Tengo que firmar el cheque
La tarjeta de crédito translates into the credit card and is a plastic card that we use to buy goods on credit. So tarjeta is a noun given in feminine singular form. Thus, the corresponding definite article must match this form, which is la. On the other hand, de crédito stands for the type of card. Finally:
Mastercard es la tarjeta de crédito
La piscina translates into the swimming pool (or simply pool) and is a large structure filled with water for people to swim in. In this way, piscina is a feminine singular noun. Thus, the corresponding definite article must match this form, which is la. On the other hand, nadamos is the conjugation of the verb nadar for the first person plural in the simple present. Finally:
Nadamos en la piscina
Las reservaciones translates into the reservations and are the arrangements to have something, such as a room in a hotel or seat in a theater kept for you to use. Also, reservaciones is a feminine plural noun, so the corresponding definite article must match this form, which is las. Finally:
Antes de ir al hotel, tengo que hacer las reservaciones
