1.The invention of books and paper
2.The Han dynasty created irrigation and water conservation projects to increase farming.
3.poems
4. Ink
5.sundial
6.signifiucant works of medicine
7.history , politics and philosophy.
Answer:
1. Es necesario que Nora piense las cosas antes de tomar la decisión.
2. Es necesario que tú entiendas la situación de estas personas.
3. Es bueno que Clara se sienta cómoda en el apartamento nuevo.
4. Es urgente que mi madre me muestre los papeles que llegaron.
5. Es mejor que David duerma un poco antes de salir.
6. Es malo que los nilos le pidan tantos regalos a los abuelos.
Explanation:
The "Oraciones subordinadas sustantivas" with subject function, work as subject of the verb of the main sentence. These can be of two types, as regards the use of the subjunctive: opinion and reaction.
The opinions expressed in these sentences can be of two types: subjective opinion, according to this opinion may or may not be shared by the majority of other speakers, and objective opinion, opinion that - at least in a certain way - can be shared by the majority of the other speakers.
We can replace the subordinate substantive sentence with "ESO".
It is a Puerto Rican dish, usually eaten at lunch or dinner. Mainly during a celebration, such as New Years or a Birthday. (Rice with Pigeon Peas)
Las alumnas no tienen los libros
You would put LOS instead of LAS because "books" is in the masculine form! The English language doesn't really have masculine forms of "the" but, it is a very important detail in Spanish classes, and if you don't pay attention your teacher can mark you off points!
One thing that helped me out in Spanish was spanishchecker.com
Hope this helps!