Select all sentences that use future time clauses correctly.
When the alarm stops, the staff will re-enter the building.✓Correct answer
As soon as the rehearsal will end, we will stack the chairs.
After the safety officer has completed every check, the doors will open.✓Correct answer
Once the snowplough will clear the lane, the driver delivers the supplies.
Explanation
The alarm and safety-check sentences correctly use present forms in their time clauses and keep future marking in the main clauses. The other sentences either place will after a time conjunction or mirror the error by using present simple in the main clause and will in the subordinate clause.