Mr. Smith left for London _____ Monday morning. [ ]

This kind of bamboo is suitable _____ pandas _____ eat.[ ]

Millie and Kitty are good friends, they often _________ each other _________study.

Some children can’t afford ________ necessary stationary. – Let’s donate our pocket money to them.

What did you do ______ your last day off? —I took my dog ______ a walk.[ ]