单词拼写： 76. Light , heat, and electricity are different forms of e____________. 77. Eating more vegetable and less fat will greatly b___________ your health. 78. The a_________ size for British schools is about 29 students in each class. 79. He i__________ the key into the lock but fond he couldn’t turn it. 80 . These plants can’t s_____________ without enough water and sunshine. 81. Of all the _______________(大陆),  Asia is the largest one. 82. Many friends were invited to Mary's birthday party, Jack____________(包括). 83. It is a bad habit to be ______________ (有瘾) to smoking. 84. I’m __________ (极其) sorry to have kept you waiting for so long a time. 85. _______________ (比较)to most of your classmates, you are lucky.