39, Mai was not sure where to stay in Paris
40, They wondered who to see at the meeting
They didn't know who to see at the meeting
41, She wondered how to go to the park then
42, Tom did not know whether he phoned Mary that night or not
Tom did not know whether to phoned Mary that night or not
43, They did not know whether to visit Ha Long the next day or not
They did not know whether they visited Ha Long the next day or not
