F ill in each blank with ONE suitable word. I f you are like most people, your intelligence varies from season to season. Y ou are probably a lot sharper in spring than you are at any __ 1 __ time of the year. S pring appears to be the __ 2 __ period of the year for thinking. O ne __ 3 __ may be that in spring man ’ s __ 4 __ powers are affected by the same factors that bring about great changes in all nature. A utumn is the __ 5 __ best season, then winter. __ 6 __ for summer, it seems to be a good time to __ 7 __ a long vacation from thinking! I t has been found that __ 8 __ weather is much more favorable for creative __ 9 __ than is summer heat. T his does not mean that all people are less intelligent in summer than they are during the __ 10 __ of the year. I t does mean, however, that the mental powers of large numbers of people tend to be lowest in summer.