Select all that apply: which sentences correctly use the zero or first conditional?
If you cover warm bread too soon, the crust becomes soft.✓Correct answer
If the lead actor recovers by six, she will join tonight's rehearsal.✓Correct answer
If the lead actor will recover by six, she will join tonight's rehearsal.
If our parcel arrives this afternoon, I put it in the storeroom.
Explanation
The bread sentence states a repeated kitchen result, and the rehearsal sentence predicts a consequence tonight. The other sentences wrongly put will in an if-clause or use a routine form for a single future occasion.