Question: their helmets were large as those of motorcyclists.
Answer: --> Their helmets were large as those of motorcyclists.

Question: a rather expensive sodamachine – so we hope it will be eagerly used.
Answer: --> A rather expensive sodamachine – so we hope it will be eagerly used.

Question: ingestion of a caustic agent, or poisonous plants
Answer:
--> Ingestion of a caustic agent, or poisonous plants