—When shall we go planting trees in the hill?

—______ it begins to rain, so they don’t need watering.

 A. Not until          B. While                C. Till                   D. Unless

—When shall we go planting trees in the hill?

—______ it begins to rain, so they don’t need watering.

 A. Not until          B. While                C. Till                   D. Unless

 — When shall we go planting trees in the hill?

—______ it begins to rain, so they don’t need watering.

   A. Not until          B. While                C. Till                   D. Unless

—When shall we go planting trees in the hill?

—______ it begins to rain, so they don’t need watering.

 A. Not until          B. While                C. Till                   D. Unless

—When shall we go planting trees in the hill?

—______ it begins to rain, so they don’t need watering.

 A. Not until          B. While                C. Till                   D. Unless