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Read the following letter and answer the questions below by choosing the best possible answer. Hola, Cristina: Mi familia y yo vamos a hacer muchas cosas este fin de semana.  Hoy, a las 10:00 a.m., voy a pasear en bicicleta.  Mi hermano, Marcos, va a ir de excursion al lago (lake) y piensa nadar toda la mañana.  A las 2:00 de la tarde, voy a almorzar con mis padres.  Mañana, hay un partido de fútbol.  Pienso que el equipo de Marcos va a ganar.  Después del partido vamos a la piscina para tomar el sol y nadar.  ¿Puedes ir conmigo a la piscina el próximo (next) fin de semana?  La natación es fantástica.   ¿Qué actividad piensa hacer Marcos en el lago?

Which of the following is conjugated correctly?

Change the following verb from the present tense to the present progressive tense. Leemos

Change the following verb from the present tense to the present progressive tense. Trabajan

Give the following date in Spanish: August 19th

Change the following verb from the present tense to the present progressive tense. Comprendo

___[A]_____ are alternative mRNA structures that are produced by binding of a __[B]______ which is often a product of a specific metabolic pathway.  

Conformational changes in the cAMP receptor protein upon binding to cAMP helps to activate transcription of the lac operon genes in the presence of lactose.  

Service providers use tools such as ________, which consists of charging different prices for different times of the day or during different days of the week to manage the variations in demand for their services.

Market share is the ratio of the ________ to those of the industry, including the firm itself.