X. 81. Teacher’s
82. exciting 83. third/tenth/twelfth/ thirteenth/twentieth/ twenty-first ....thirtieth thirty-first...
84. was listening 85. as soon as
86. How tall the tree is!
87. Can you take me home?
88. He has a bag on his back.
89. I want to tell you a popular story. 90. I hope that you are happy all the time.