98. Edison enjoyed ___________ (try) his new ideas.

97. The boy kept ___________ (ask) strange questions to his teacher, it made the teacher unhappy.

96. He hopes ___________ (see) the famous football player as soon as possible.

95. I had a computer lessons first. Then I went on ___________ (have) tennis lessons.

94. The students kept ___________(talk)about the football match.

93. You'd better try ___________ (do) it by yourself.

92. Can a shark stop ___________ (swim)? -No, It can't

91. Have you saw someone ___________ (ski) before?

90. Have you finished ___________ (read) the book?

89. Who is doing well in ___________ (describe) things?