1. When do drivers driving at a constant speed meet?

2. Party A and Party B have a clear division of labor and tacit cooperation, and ask when the project will end.

3. Crazy pool, when will it be filled with water while filling it?

The old farmer put the chicken and the rabbit in the cage and asked them how many each had.

Xiao Ming went out early, but deliberately slowed down and waited for his brother and sister, asking when he would catch up.