Question

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match the problems with their solutions.
a crew built a concrete structure to seal the reactor.
a crew poured sand on the reactor.
the nsc was built.
problem\tsolution
the explosion caused a fire.
rainwater might have triggered another explosion.
erosion damaged the sarcophagus.

Explanation:

1. For the problem "The explosion caused a fire", pouring sand on the reactor (a common fire - fighting method for such situations, like in nuclear reactor incidents where sand can smother fires) is the solution. So match "The explosion caused a fire" with "A crew poured sand on the reactor".
2. For the problem "Rainwater might have triggered another explosion", building a concrete structure to seal the reactor can prevent rainwater from entering and triggering an explosion. So match "Rainwater might have triggered another explosion" with "A crew built a concrete structure to seal the reactor".
3. For the problem "Erosion damaged the sarcophagus", building the NSC (New Safe Confinement, which is a structure built to address issues with the damaged sarcophagus at Chernobyl, for example) is the solution. So match "Erosion damaged the sarcophagus" with "The NSC was built".

Answer:

• "The explosion caused a fire" - "A crew poured sand on the reactor"
• "Rainwater might have triggered another explosion" - "A crew built a concrete structure to seal the reactor"
• "Erosion damaged the sarcophagus" - "The NSC was built"