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 areexpensive d. they are badQuestion 86-90In 1920, after some 39 years of problems with diseases, high cost and politics, ThePanama Canal was officially opened, finally linking the Atlantic and Pacific Oceans byallowing ships to pass through the fifty-mile canal zone instead of travelling some seventhousands miles around Cape Horn. It takes a ship approximately eight hours to complete thetrip through the canal and costs an average of fifteen thousand dollars, one tenth of what it wouldcost an average ship to round the Horn. More than fifteen thousand ships pass through its lockseach year.