He is really like a gentleman and he usually thedoor open to let the ladies go first

Why didn’t you chat with that friendly foreigner just now?— I’d like to, but the trouble was ___ ___he said was difficult for me to understand[ ]

Parents are taught to understand ________ important education is to their children’s future.

Linda, with her parents，_______ the Wolf Hill, andthey will be back this afternoon.

Mary wrote an article on ________ the team had failed to win the game