Scrambled Sentences

1. The instrument recorded tiny movements in the ground.
2. Scientists placed a sensitive instrument near the volcano.
3. These measurements helped them monitor volcanic activity.

Correct Order

2 - 1 - 3

Solution

1. Sentence 2 introduces 'a sensitive instrument'.
2. Sentence 1 must follow because 'The instrument' refers to that introduced object.
3. 'These measurements' in sentence 3 refers to the recorded movements.