It’s time you changed your attitude ___ your studies, for the time is running out.
__________ after a whole day's work that he could hardly stand it.
That is the only way we can imagine __________ the overuse of water in students' bathrooms.
It's wise of parents to chat and exchange ideas with their kids __________ dinner.
My uncle is a very humourous person, and he often __________ us for hours with funny stories.
These two Christmas trees are of __________ size, but the one they bought yesterday is maybe twice __________ size of them.