4. Mis hijas son muy ____. (inteligente)

34. Nosotros no ____ al profesor de matematicas, pero sabemos quien es. (conocer)

20. Which is the correct present-tense form? Ustedes ____ abrir la puerta.

40. Which sentence is correct in the present progressive with a reflexive verb?

47. Conocer is used to say you know how to do something.

38. Which sentence correctly uses personal a?

24. Gusta is used with singular nouns and with infinitives.

3. En la mesa no ____ libros.

5. Yo ____ veinte anos. (tener)

Which is the best currently available predictive biomarker for response to PD-1 inhibitor monotherapy across tumor types?