For most of our history, the population of humans has remained at very low levels. The most widely accepted estimates indicate that there were about 5 million humans at the beginning of the agricultural era, about 10,000 years ago; about 100 million during the Egyptian empire 7,000 years later; and about 250 million at the dawn of the Christian religion in 1 C.E. (C.E. refers to Common Era, the
year designation used by most Western countries). The population was growing, but at a very slow rate—approximately 0.1% per year. Beginning around 1750, the rate at which the human population was growing jumped to about 2% per year. The human population reached 1 billion in 1800, had doubled to 2 billion by 1930, and had doubled again to 4 billion by 1970 . Although the current growth rate is slower, about 1.2% per year, the rapid increase in population looks quite dramatic on a graph of human population over time.
The purpose of the paragraph is
a. to explain to the reader why the rate of population growth is slow.
b. to discuss the reasons why the human population has not been increasing at a faster pace.
c. to inform the reader that although population rates have varied over the years, the increase has been dramatic.
The tone of the passage is
a. critical. b. objective. c. disbelieving.
c, b
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Éste es el cuento con __________________me entretuve. (quienes que / el que)
Selecciona el pronombre relativo correcto para completar las siguientes oraciones.
Llena los espacios en blanco con la palabra o estructura que mejor complete el sentido de cada oración. Haz todos los cambios que sean necesarios para que cada oración sea gramaticalmente correcta.
A. padre, pariente, relativo 1. Quiero que mi novio conozca a mis ___. Después de todo, van a ser sus suegros. 2. Marta va a invitar a todos sus _____ a la boda. Habrá muchos invitados porque su familia es bien grande. B. antiguo, viejo, anciano, mayor 3. En este museo tienen una exhibición de monedas __________. 4. En los autobuses hay asientos reservados para los __________. 5. Luis es ________ que su hermano Pedro. 6. Por lo general, las personas ________ tienen problemas de salud. C. divertirse, entretenerse, gozar, pasarlo bien, disfrutar 7. Me parece que ayer Amanda y Elena _______ mucho en el baile. 8. Carlos siempre _______ leyendo el periódico mientras te espera. 9. Ayer, nosotros ________ de una comida excelente en el mejor restaurante de la ciudad. 10. Si estás aburrido, haz algo para ________.
Voy a poner la basura ________________ del fregadero.
Fill in the blank(s) with the appropriate word(s).
no acostarse sin cenar _________________________________________________________
Write the formal commands (Uds.) for each infinitive to give advice to university students on how to eat well. Pay attention to pronoun placement and written accents.