Multiple choice

Directions: Select the correct word or phrase to complete a grammatical and idiomatic sentence.

Alfalfa plants flourish in fertile and 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

Option (4) 'that is' is correct. Correct conjunction and auxiliary used, since the subject (soil) is singular.