I'm sure that someone forgot to lock the door

2. I'm sure that someone forgot to lock the door.

--> Someone must…………………….

4. The course finished with a big party.

--> At the end............................................... .................................................. ....

6. Although she said that she would come, I don't think she ever will.

—> Despite........................................... ...............................

9. When did you start the project?

—> How long.............................................. .................................................. ....

10. Their wedding will be held in a lovely church.

--> The church............................................ .................................................. ......