Jean Bernoulli returned to St Petersburg in 1766, soon afterwards losing the sight of his ________ eye.

No bread eaten by man is as good as ________ got by his own labor. 

Tom’s teacher kept on telling him to practise speaking English, but _______ didn’t work.

—Which of those electronic dictionaries do you like most? —        . They are both expensive and of little use.

To save class time, our teacher has ________ students do half of the exercise in class and complete the other half for homework. .