Multiple choice

Directions: Choose a suitable option to fill in the blank:

� to materials, such as asbestos and coal may cause the lung disease pneumoconiosis.

  1. Dust inhaled during years of exposure

  2. Dust inhales during years of exposure

  3. Dust is being inhaled during years of exposure

  4. Dust was inhaled during years of exposure
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

"Dust inhaled during years of exposure" is a noun phrase where "inhaled" is a past participle modifying "dust" in a reduced relative clause. The other options are wrong: "inhales" would mean the dust performs the action, while the passive forms are unnecessarily wordy.

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