1, They wondered how to use that support service
2, He had no idea who to turn to for help
3, Mai asked her mother when to turn off the oven
4, Phong and Minh had no idea where to park their bike
5, He had no idea whether to call her or not
6, They wondered what to do to make Linh feel happier
7, Nguyen asked his teacher when to start the computer
8, She said she didn't really know what to say in her graduation speech and asked to be helped
9, They had no idea what to do in that situation
10, He wondered whether to tell that to her or not
11, She wasn't sure who to contact
12, He didn't know where to find more information about that
