Question

fill in the blanks
no, no puedo salir. estoy ____ un libro y tengo que ____ veinte páginas más.
1 leyendo... leer
2 leer... leyendo
3 leo... leo

Explanation:

1. The first blank follows "Estoy" (I am), which requires the present participle form of the verb "leer" (to read) to form the present continuous tense, so "leyendo" (reading) is correct.
2. The second blank follows "tengo que" (I have to), which requires the infinitive form of the verb, so "leer" (to read) is correct.

Answer:

1. leyendo ... leer