Choose the option that complete the sentences a) What time __________the train this afternoon? * will you be you are taking you are going to take are you taking b) A: I need someone to help me with the children. B: Don't worry, I'm free ___________ after them, starting next Monday. * I'll look I'm going look I'll be looking I'm look c) I ____celebrating 20 years old next week. * going to be am being will be was be d) He __________ with his classmates at the end of the school year.​