Complete the second conbitional sentences

1. I have already written my composition. May I go out?

2. How many pages of this book have you read?

3. Mike has just received a letter.

4. We had already tidied all the rooms when the guests arrived.

5. I will have carried out all my duties by the end of this year.

6. What have you done for your homework?

7. The students had learned all the words by the time their teacher came.

8. Have you ever been to St. Petersburg?

9. We hadn't posted the letter before they arrived.

10. What has happened? Why is she crying?

spring -one of the fourseasons of the year, after thewinter andthe summer.summer -one of the fourseasons,between springand autumn,is characterized by thehigh temperatureenvironment.consists of threemonthsin the northernhemisphere -june, july andaugust,in the south -december, januaryand february.autumnis one of thefour seasons of theyear, betweensummer and winter.autumn- a transitionalseason thatsignificantlyreducedaylight hours andgradually decreasesthe temperatureof the environment.winter -one of the fourseasons of the year, betweenautumn and spring.the main feature ofthis time of year- a stablelow temperature in manyregions of the earthfalls andfallsto the surfacesnow