—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

--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.

—When shall we go planting trees in the hill?
—______ it begins to rain, so they don’t need watering.