The charity sale our school organizes every year has taught us much that we would never have _____ learned in class

Don’t call me at the office ________ it is necessary.

Despite such a big difference in towards what one eats,there is no doubt_______people in the West regard the Chinese food as something special.

believes his reasons for being latethat he was caught in a traffic jam, _______ made him embarrassed

Car prices have been going down sharply in the last 20 years.—It’s not surprising because the law of market ________ the price of a product