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.