Because "Tener" is an irregular verb and you are trying to conjugate it into the "yo" or "I" form, it would be "tengo".
Using the information you know about gender, choose the best answer.
Silvia es _________amiga de Pedro.
Answer : 2.) la
Silvia es la amiga de Pedro.
Explanation : The subject is Silvia, that is a feminine singular noun, so the article must be feminine singular too. La
Hope this helps!
Un instrumento musical es la trompeta.
C.abrira
Bear in mind that the word should have an accent mark over the final 'a' like this -- abrirá -- in order to be fully correct.