Wonders English 3: U6 L3: The Great Energy Debate

This means it can be replaced.

A remarkable concurrence of events without casual connection.

This word means using up.

This means impossible to believe.

This means working in a well-organized and competent way.

It means having changed in form or character.

It is to place or fix in a position ready to use.

It means a result or effect of an action or condition.