Rewrite as instructed: "He is too weak to walk." (Begin: He is so …)

Change into indirect speech: The teacher said to the class, "Do not make a noise."

Change into the passive voice: "They are building a new bridge across the river."

Fill in with the correct preposition: He has been absent ___ school ___ Monday.

Join the sentences using a relative pronoun: "I met a boy. He had won the first prize."

Correct the sentence: "One of my friend are coming tomorrow."

Explain the difference between "their", "there" and "they're", and use each in a sentence.