Multiple choice

Directions: Choose the most suitable form of verb from the given options.

At that time, they ________ (work) for two hours.

  1. will have been working

  2. would be working

  3. will be working

  4. are working
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 'For two hours' indicates part completion (have been), working indicates continuation. 

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