Mrs Chen is very strict — we don’t dare to say a word _____ she asks us to

Owing to a financial disagreement, the cooperation broke down and the two businessmen finally went their ______ ways.

________ can you finish this English examination– In about one and a half hours.

Tom was ______ that he couldn’t understand ______ difficult sentence.

We know _____better and _____ the unfinished workof perfecting the union falls to each of its citizens.