After a talk with his mother, the little boy has seen to _____ that the same mistake doesn’t happen again. 

Nine in ten parents said there were significant differences in their approach to educating their children compared with __ of their parents.

The look on Max’s face was ______ between puzzlement and anger. 

—Look! There are lots of old people in the park.—They look relaxed. Some are playing the card , ___________ are chatting.

The sunspot came into its active stage last year,        that happens once every eleven years.