The employment rate has continued to rise in big cities thanks to the efforts of the local govenments to increase            .

I hope there are enough books for each student to have ___________. 

The children were catching butterflies in the garden. Some caught a lot, and others caught _______at all.

—Do you want tea or coffee?—          . I really don’t mind.

I can’t stand _______ when people litter around in public places.