WHY AREN’T SWEETS GOOD FOR OUR TEETH

85. Why aren’t sweets good for our teeth?

a. they have a lot of sugar

b. they cause decay

c. they are expensive d. they are bad

Question 86-90 In 1920, after some 39 years of problems with diseases, high cost and politics, The Panama Canal was officially opened, finally linking the Atlantic and Pacific Oceans by allowing ships to pass through the fifty-mile canal zone instead of travelling some seven thousands miles around Cape Horn. It takes a ship approximately eight hours to complete the trip through the canal and costs an average of fifteen thousand dollars, one tenth of what it would cost an average ship to round the Horn. More than fifteen thousand ships pass through its locks each year.