Multiple choice

Directions: Select the best option and fill in the blank.

Alfalfa plants flourish in fertile, well-drained soil ____ neutral or slightly alkaline.

  1. which

  2. is that

  3. is

  4. that is
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Correct conjunction and auxiliary should be used, since the subject is singular. The quality of soil is a restrictive clause, so 'that is' should be used.

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