¿Cómo cambian? Can you remember how all of the stem-changing…

¿Cómо cаmbiаn? Cаn yоu remember hоw all of the stem-changing verbs change? Complete each of the following sentences with the correct form of the present tense of the logical verb in parenthesis. 9. Mis amigos [BLANK-1] (venir / pensar) a Chicago mañana.