The harder you work,____________

erage price of commercial houses in our city hasreduced by _____ 30 percent ,so we can buy one at _____ low price .

I will never understand how it ______ that you failedin the examination for you are such a good student.

What bad weather! The plane will _______ at 8:00 o’clock this evening.

Which of these two English books will youborrow—I’ll borrow ____________ of them becausethey are very interesting.