This printer is of good quality. If it() break down within the first year, we would repair it at our expense.
The book is _______ that one.
The name of our country is PRC, which _____ the People’s Republic of China.
He came back late, _____ which time all the guesses had already left.
Because so many visitors are visiting our school today, some teachers have to _______ guides.
She thinks only of herself; she doesn’t _____ other people.