Multiple choice

Directions: Fill in the blank.

The depletion of natural resources, in addition to the rapid increase in utilisation of these resources, _______ encouraged many nations to conserve energy.

  1. have

  2. has

  3. would

  4. could
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The main subject is 'The depletion' (singular). Phrases starting with 'in addition to' are parenthetical and don't change the number of the subject. Therefore, the verb must be singular 'has', not plural 'have'. 'Would' and 'could' are grammatically incorrect - present perfect 'has encouraged' is the right tense.

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